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MAX9132GUP+T
Programmable, High-Speed, Multiple Input/Output LVDS Crossbar Switches
General DescriptionThe MAX9132/MAX9134/MAX9135 high-speed, multi-
ple-port, low-voltage differential signaling (LVDS) cross-
bar switches are specially designed for digital video
and camera signal transmission. These switches have a
wide bandwidth, supporting data rates up to 840Mbps.
The MAX9132 has three input ports and two output
ports, the MAX9134 has three input ports and four out-
put ports, and the MAX9135 has four input ports and
three output ports. The digital video or camera signal
can go through the switches from an input port to one
or multiple output ports.
The MAX9132/MAX9134/MAX9135 switch routing is
programmable through either an I2C interface or a
Local Interconnect Network (LIN) serial interface. In
addition, the MAX9134/MAX9135 provide pins to set
switch routing. These pins also set the initial conditions
for the I2C mode. To generate more input or output
ports, these switches can be connected in parallel or in
cascade.
The MAX9132/MAX9134/MAX9135 operate from a
+3.3V supply and are specified over the -40°C to
+105°C temperature range. The MAX9134/MAX9135
are available in a 32-pin (5mm x 5mm) TQFP package,
while the MAX9132 is available in a 20-pin (6.5mm x
4.4mm) TSSOP package. The input/output port pins are
rated up to ±25kV ESD for the ISO Air-Gap Discharge
Model, ±15kV ESD for the IEC Air-Gap Discharge
Model, and ±10kV for the ESD Contact Discharge
Model. All other pins support up to ±3kV ESD for the
Human Body Model.
ApplicationsDigital Video in Automotive
Video/Audio Distribution Systems
Camera Surveillance Systems
High-Speed Digital Media Routing
Navigation System Displays
FeaturesSupports Up to 840Mbps Data Rate at Each Port Nonactivated Ports are in High-Impedance State
for Easy Port ExpansionProgrammable Preemphasis on LVDS OutputsSelf Common-Mode Biasing on LVDS InputsThree Selectable Approaches for Switch Routing:2C Interface
LIN Interface
Programmable Pins (MAX9134/MAX9135)±25kV ESD Protection+3.3V Supply Voltage-40°C to +105°C Operating Temperature Range
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
Pin Configurations19-4215; Rev 2; 4/11
EVALUATION KIT
AVAILABLE
Note:Devices are specified over the -40°C to +105°C temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations continued at end of data sheet.
Ordering Information
PARTPIN-PACKAGEINPUTSOUTPUTSROUTE CONTROL
MAX9132GUP+20 TSSOP-EP*32I2C, LIN
MAX9132GUP/V+20 TSSOP-EP*32I2C, LIN
MAX9134GHJ+32 TQFP-EP*34I2C, LIN, Pins
MAX9135GHJ+32 TQFP-EP*43I2C, LIN, Pins
SCL/RXD
LVDSVDD
DOUT0+DIN0-
DIN0+
DVDD
TOP VIEW
DOUT0-
DOUT1+
DOUT1-
LVDSGNDDIN2-
DIN2+
DIN1-
DIN1+
AS1/NSLP
AS0
*EXPOSED PAD. CONNECT EP TO GND.
AVDD
MAX9132
TSSOP-EP*SDA/TXD
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VAVDD= VDVDD= VLVDSVDD= +3.0V to +3.6V, TA= -40°C to +105°C, unless otherwise noted. Typical values are at VAVDD= VDVDD
= VLVDSVDD= +3.3V, TA= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDDto GND...........................................................-0.3V to +4.0V
All Pins to GND.............................................-0.3V to VDD+ 0.3V
Short-Circuit Duration (all outputs).............................Continuous
Continuous Power Dissipation (TA= +70°C)
32-Pin TQFP (derate 27.8mW/°C above +70°C)........2222mW
20-Pin TSSOP (derate 26.5mW/°C above +70°C).....2122mW
Operating Temperature Range.........................-40°C to +105°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
ESD Protection
Human Body Model (RD= 1.5kΩ, CS= 100pF)
All Other Pins Including SCL, SDA to GND.................±2kV
IEC 61000-4-2 (RD= 330Ω, CS= 150pF)
Contact Discharge
(DIN_, DOUT_) to GND..............................................±10kV
Air-Gap Discharge
(DIN_, DOUT_) to GND..............................................±15kV
ISO 10605 (RD= 2kΩ, CS= 330pF)
Contact Discharge
(DIN_, DOUT_) to GND..............................................±10kV
Air-Gap Discharge
(DIN_, DOUT_) to GND..............................................±25kV
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply VoltageVDD3.03.6V
MAX91326080
Supply Current
IAVDD,
IDVDD,
ILVDSVDD
Outputs switching at
20MHzMAX9134/MAX913586100
SINGLE-ENDED CMOS INPUTS (PD, FS, RXD)
Input High LevelVIH12.0V
Input Low LevelVIL10.8V
Input High CurrentIIN1VIN = 0 to VDD-20+20µA
SINGLE-ENDED OUTPUTS (TXD, AS1/NSLP)
Output High LevelVOHVDD -
0.4V
Output Low LevelVOLIOL = 4mA0.4V
3-LEVEL INPUTS (S5–S0, AS0, AS1)
Input High LevelVIH32.5V
Input Low LevelVIL30.8V
Input Open LevelVIO3Measured at the input pins1.21.451.9V
Input CurrentIL3, IH3VIL3 = 0V or VIH3 = VDD-20+20µA
Note 1:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to /thermal-tutorial.
20 TSSOP-EP
Junction-to-Ambient Thermal Resistance (θJA)........37.7°C/W
Junction-to-Case Thermal Resistance (θJC)..................2°C/W
32 TQFP-EP
Junction-to-Ambient Thermal Resistance (θJA)...........36°C/W
Junction-to-Case Thermal Resistance (θJC)..................4°C/W
PACKAGE THERMAL CHARACTERISTICS (Note 1)
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DIFFERENTIAL INPUTS (DIN_)
Differential Input High ThresholdVIDHVID = VIN+ - VIN-100mV
Differential Input Low ThresholdVIDLVID = VIN+ - VIN--100mV
Common Input VoltageVCOMVCOM = (VIN+ - VIN-)/21.001.291.60V
Input CurrentIIN+, IIN--50+50µA
DIFFERENTIAL OUTPUTS (DOUT_)
Differential Output VoltageVOD50Ω load, no preemphasis2503.65450mV
Change in VOD Between
Complementary Output States|∆VOD|0135mV
Output Common-Mode VoltageVCOM1.1251.291.475V
Change in VCOM Between
Complementary Output States|∆VCOM|40135mV
Output Short-Circuit CurrentIOSTwo output pins connected to GND-15-7mA
SERIAL-INTERFACE INPUT, OUTPUT (SCL, SDA)
Input High LevelVIH0.7 x
VDDV
Input Low LevelVIL0.3 x
VDDVi g h- Level Outp ut Leakag e C ur r entILEAKHOpen drain with 1kΩ pullup to VDD1µA
Low-Level OutputVOLIOL = 3mA0.4V
Input CapacitanceCI10pF
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DIFFERENTIAL SIGNALS (DOUT_)
Output-to-Output SkewtSKRL = 100Ω differential50250ps
Rise TimetR
20% to 80% of the signal swing; RL = 50Ω
differential (RL = 100Ω double termination),
CL = 5pF
0.30.4ns
Fall TimetF
20% to 80% of the signal swing; RL = 50Ω
differential (RL = 100Ω double termination),
CL = 5pF
0.30.4ns
Duty CycleDInput duty cycle 50%; 840Mbps clock
pattern4555%
DC ELECTRICAL CHARACTERISTICS (continued)
(VAVDD= VDVDD= VLVDSVDD= +3.0V to +3.6V, TA= -40°C to +105°C unless otherwise noted. Typical values are at VAVDD= VDVDD
= VLVDSVDD= +3.3V, TA= +25°C.) (Note 2)
AC ELECTRICAL CHARACTERISTICS
(VAVDD= VDVDD= VLVDSVDD= +3.0V to +3.6V, TA= -40°C to +105°C, unless otherwise noted. Typical values are at VAVDD=
VDVDD= VLVDSVDD= +3.3V, TA= +25°C.) (Notes 3, 4)
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VID = 200mV, VCOM = 1.2V, 840Mbps clock
pattern; input transition time (20% to 80%) =
200ps30ps
Output Peak-to-Peak Jitter
(Pr eem p hasi s O n) tJ
VID = 200mV, VCOM = 1.2V, 840Mbps23 - 1 PRBS pattern; input transition time
(20% to 80%) = 200ps180ps
Propagation DelaytD2ns
LVDS Switchover TimetLONS w i tchover ti m e fr om one channel to another 100ns
LV D S w i th P r eem p hasi s Am p l i tud e|VODPE|50Ω differential (100Ω double termination)
load, 840Mbps335530680mV2C TIMING
CLK FrequencyfSCL400kHz
Start Condition Hold TimetHD:STA(Figure 1)0.6µs
Low Period of SCL ClocktLOW(Figure 1)1.3µs
High Period of SCL ClocktHIGH(Figure 1)0.6µs
Repeated START Condition
Setup TimetSU:STA(Figure 1)0.6µs
Data Hold TimetHD:DAT(Figure 1)00.9µs
Data Setup TimetSU:STA(Figure 1)100ns
Setup Time for STOP ConditiontSU:STO(Figure 1)0.6µs
Bus Free TimetBUF(Figure 1)1.3µs
Note 2: Parameters are 100% production tested at TA= +25°C, unless otherwise noted.
Note 3: I2C timing parameters are specified for fast-mode I2C. Maximum data rate = 400kbps.
Note 4:Parameters are guaranteed by design.
AC ELECTRICAL CHARACTERISTICS (continued)
(VAVDD= VDVDD= VLVDSVDD= +3.0V to +3.6V, TA= -40°C to +105°C, unless otherwise noted. Typical values are at VAVDD=
VDVDD= VLVDSVDD= +3.3V, TA= +25°C.) (Notes 3, 4)
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
SUPPLY CURRENT vs. SUPPLY VOLTAGEMAX9132/4/5 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
PREEMPHASIS
840Mbps 1010 PATTERN
NO PREEMPHASIS
+105°C
+105°C
+25°C
+25°C
-40°C
-40°C
SUPPLY CURRENT vs. DATA RATE
MAX9132/4/5 toc02
DATA RATE (Mbps)
SUPPLY CURRENT (mA)
PREEMPHASIS
NO PREEMPHASIS
1010 PATTERN
+105°C
+105°C
+25°C
+25°C
-40°C
-40°C
PEAK-TO-PEAK JITTER
vs. SUPPLY VOLTAGE
MAX9132/4/5 toc03
SUPPLY VOLTAGE (V)
PEAK-TO-PEAK JITTER (ps)
PREEMPHASIS
NO PREEMPHASIS
840Mbps PRBS
PEAK-TO-PEAK JITTER
vs. TEMPERATURE
MAX9132/4/5 toc04
TEMPERATURE (°C)
PEAK-TO-PEAK JITTER (ps)
840Mbps PRBS
NO PREEMPHASIS
PREEMPHASIS
PEAK-TO-PEAK JITTER
vs. DATA RATE
MAX9132/4/5 toc05
DATA RATE (Mbps)
PEAK-TO-PEAK JITTER (ps)
PRBS PATTERN
NO PREEMPHASIS
PREEMPHASIS
CHANNEL-TO-CHANNEL SKEW
vs. TEMPERATURE
MAX9132/4/5 toc06
TEMPERATURE (°C)
CHANNEL-TO-CHANNEL SKEW (ps)
CHANNEL-TO-CHANNEL SKEW
vs. DATA RATE
MAX9132/4/5 toc07
DATA RATE (Mbps)
CHANNEL-TO-CHANNEL SKEW (ps)
PREEMPHASIS
1010 PATTERN
VDIFF = 200mV
NO PREEMPHASIS
1ns/div
EYE DIAGRAMMAX9132/4/5 toc08
150mV/div200Mbps PRBS
NO PREEMPHASIS
1ns/div
EYE DIAGRAMMAX9132/4/5 toc09
150mV/div
200Mbps PRBS WITH PREEMPHASIS
Typical Operating Characteristics(VAVDD= VDVDD= VLVDSVDD= +3.3V, TA = +25°C, unless otherwise noted.)
Pin Description
PIN
MAX9132
TSSOP
MAX9134
TQFP
MAX9135
TQFP
NAMEFUNCTION13130PDP ow er - D ow n Inp ut. P D = l ow for p ow er - d ow n. P D = hi g h for p ow er - up w i thoutr eem p hasi s. Leave P D op en for p ow er - up w i th p r eem p hasi s on al l outp uts.
23231DVDDDigital Power Supply. Bypass DVDD to DGND with 0.1µF and 0.01µF
capacitors as close as possible to the device.11DIN0+Port 0 Positive Input22DIN0-Port 0 Negative Input33DIN1+Port 1 Positive Input44DIN1-Port 1 Negative Input5—AGNDAnalog Ground65DIN2+Port 2 Positive Input76DIN2-Port 2 Negative Input—7DIN3+Port 3 Positive Input—8DIN3-Port 3 Negative Input
989AVDDAnalog Power Supply. Bypass AVDD to AGND with 0.1µF and 0.01µF
capacitors as close as possible to the device.——FSI2C and LIN Interface Selection Input. FS = low for LIN, FS = high for I2C.910S0Routing Selection 0 Input. See Tables 6a and 6b.1011S1Routing Selection 1 Input. See Tables 6a and 6b.1112S2Routing Selection 2 Input. See Tables 6a and 6b.1213S3Routing Selection 3 Input. See Tables 6a and 6b.1314AS03-Level I2C Address Selection 0 Input (Table 3) or LIN Identifier Selection 0
Input (Table 4)
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
Typical Operating Characteristics (continued)(VAVDD= VDVDD= VLVDSVDD= +3.3V, TA = +25°C, unless otherwise noted.)
200ps/div
EYE DIAGRAMMAX9132/4/5 toc10
150mV/div840Mbps PRBS
NO PREEMPHASIS
200ps/div
EYE DIAGRAMMAX9132/4/5 toc11
150mV/div840Mbps PRBS WITH PREEMPHASIS
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
PIN
MAX9132
TSSOP
MAX9134
TQFP
MAX9135
TQFP
NAMEFUNCTION1415AS1/NSLP
3-Level I2C Address Selection 1 Input (in I2C Mode, Table 3). In LIN bus
mode, it becomes an NSLP output, the sleep mode activation pin (active
low) to the LIN bus driver.16, 2519, 24LVDSGNDLVDS Ground17—DOUT3-Port 3 Negative Output18—DOUT3+Port 3 Positive Output1917DOUT2-Port 2 Negative Output2018DOUT2+Port 2 Positive Output2120DOUT1-Port 1 Negative Output2221DOUT1+Port 1 Positive Output2322DOUT0-Port 0 Negative Output2423DOUT0+Port 0 Positive Output15, 2616, 25LVDSVDDLVDS Supply Input. Bypass LVDSVDD to LVDSGND with 0.1µF and 0.01µF
capacitors as close as possible to the device.2726SDA/TXDI2C Data Link Input/LIN Tx Output. SDA/TXD becomes SDA when in I2C
mode and TXD when in LIN mode.2827SCL/RXDI2C Clock/LIN Rx Input. SCL/RXD becomes SCL when in I2C mode and RXD
when in LIN mode.2928S5Routing Selection 5 Input. See Tables 6a and 6b.3029S4Routing Selection 4 Input. See Tables 6a and 6b.—32DGNDDigital Ground
———EPExposed Pad. Internally connected to GND. Connect to a large ground
plane to maximize thermal performance.
Pin Description (continued)
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar SwitchesDOUT0+
DOUT0-
MAX9135
ROUTING
CONTROL
REGISTERS
SCL/RXD
AS0DOUT1+
DVDD
DGND
AVDD
AGND
LVDSVDD
LVDSGND
DOUT2+
DOUT1-DOUT2-
DIN0+DIN1+
DIN0-DIN1-
DIN2+
DIN2-
DIN3+
DIN3-S5
AS1/
NSLP
SDA/TXD
I2C/LIN
INTERFACES3S2S1S0
MAX9132
ROUTING
CONTROL
REGISTERS
SCL/RXD
AS0DOUT0+
DVDD
DGND
AVDD
AGND
LVDSVDD
LVDSGND
DOUT1+
DOUT0-DOUT1-
DIN0+DIN1+
DIN0-DIN1-
DIN2+
DIN2-FS
AS1/
NSLP
SDA/TXD
I2C/LIN
INTERFACE
DOUT3+
DOUT3-
DOUT0+
DOUT0-
MAX9134
ROUTING
CONTROL
REGISTERS
SCL/RXD
AS0DOUT1+
DVDD
DGND
AVDD
AGND
LVDSVDD
LVDSGND
DOUT2+
DOUT1-DOUT2-
DIN0+DIN1+
DIN0-DIN1-
DIN2+
DIN2-S5
AS1/
NSLP
SDA/TXD
I2C/LIN
INTERFACES3S2S1S0
Functional Diagrams
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
Detailed DescriptionThe MAX9132/MAX9134/MAX9135 high-speed, multi-
ple-port, low-voltage differential signaling (LVDS)
crossbar switches are specially designed for digital
video and camera signal transmission. These switches
have a wide bandwidth, supporting data rates up to
840Mbps. This allows the use of MAX9132/MAX9134/
MAX9135 with LVDS serializers/deserializers (SerDes)
to create a complete video or camera network. The
MAX9132 has three input ports and two output ports,
the MAX9134 has three input ports and four output
ports, and the MAX9135 has four input ports and three
output ports. The video or camera signal can go
through the switch from an input port to one or multiple
output ports.
The MAX9132/MAX9134/MAX9135 switch routing is
programmable through either an I2C interface or a
Local Interconnect Network (LIN) serial interface. AS0
and AS1 set the slave addresses for either of these
modes, allowing several devices on a bus simultane-
ously. In addition, the MAX9134/MAX9135 provide
3-level pins S[5:0] to set switch routing and the initial
conditions for I2C mode. To improve the signal integrity,
all the LVDS outputs feature selectable preemphasis.
Initial Power-UpOn power-up, all control registers have a value of 0x00.
For the MAX9134/MAX9135, leaving S[5:0] unconnect-
ed, allows control through the LIN interface with all out-
puts deactivated. Otherwise, the switch runs in
pin-control mode with S[5:0] controlling the switch rout-
ing. The I2C is also active while the device is in pin-
control mode. Successful routing through I2C overrides
the pin settings. For more details, see the I2C Interface
section. For the MAX9132, the FS input determines
which interface is active.
Register DescriptionThere are four 1-byte control registers in the
MAX9132/MAX9134/MAX9135. These registers control
the routing of the switch. Table 1 describes the register
map for both I2C and LIN. When the MAX9132/
MAX9134/MAX9135 operate in LIN mode, register 0x00
acts as an error flag register. Its function is described
in detail in Table 5. In either I2C or LIN mode, the con-
trol registers (0x01, 0x02) program the MAX9132/
MAX9134/MAX9135 switch routing control. In addition,
these registers can individually activate and deactivate
preemphasis for each output port. Table 2a describes
the routing for the MAX9132/MAX9134 and Table 2b for
the MAX9135. For I2C programming, register 0xFF con-
SDA
SCL
tHD:STA
tLOW
tHIGHtF
tSU:DATtSU:STA
tSU:STO
tBUF
tHD:STA
tHD:DAT
START
CONDITION
STOP
CONDITION
START
CONDITION
REPEATED
START CONDITION
Figure 1. I2C Serial-Interface Timing Details
REGISTER
ADDRESS (HEX)
READ/
WRITELIN INTERFACE DESCRIPTIONI2C DESCRIPTION0x00RLIN Status RegisterReserved
0x01R/WSwitch Control Register 1Switch Control Register 1
0x02R/WSwitch Control Register 2 (MAX9134/MAX9135
only)
Switch Control Register 2 (MAX9134/MAX9135
only)
0xFFWReservedRoute Activation Register
Table 1. Register Address Map
MAX9132/MAX9134/MAX9135
Programmable, High-Speed, Multiple
Input/Output LVDS Crossbar Switches
REGISTER
ADDRESSREGISTER BIT(S)DESCRIPTIONVALUEFUNCTIONDOUT1 preemphasis offD7DOUT1 Preemphasis1DOUT1 preemphasis on
000DOUT1 in high impedance
001DOUT1 connected to DIN1
010DOUT1 connected to DIN0D[6:4]DOUT1 Routing
Connection
011DOUT1 connected to DIN2DOUT0 preemphasis offD3DOUT0 Preemphasis1DOUT0 preemphasis on
000DOUT0 in high impedance
001DOUT0 connected to DIN1
010DOUT0 connected to DIN0
0x01
D[2:0]DOUT0 Routing
Connection
011DOUT0 connected to DIN2DOUT3 preemphasis offD7DOUT3 Preemphasis1DOUT3 preemphasis on
000DOUT3 in high impedance
001DOUT3 connected to DIN1
010DOUT3 connected to DIN0D[6:4]DOUT3 Routing
Connection
011DOUT3 connected to DIN2DOUT2 preemphasis offD3DOUT2 Preemphasis1DOUT2 preemphasis on
000DOUT2 in high impedance
001DOUT2 connected to DIN1
010DOUT2 connected to DIN0
0x02
(MAX9134 only)
D[2:0]DOUT2 Routing
Connection
011DOUT2 connected to DIN2
Table 2a. I2C/LIN Switch Routing Control Registers for the MAX9132/MAX9134 BIT 7…………….……………… BIT 0 ACK BIT BIT 7…………….…………………BIT 0 ACK BIT
8-BIT DATAAS
BIT 7…….…….…………BIT 0 ACK BIT
7-BIT SLAVE ID0ASADDRAS
ADDRESS/COMMAND BYTEP
SINGLE WRITE
SINGLE READ
BIT 7…………….……….BIT 0 ACK BITBIT 7………….…………BIT 0 ACK BITBIT 7…………….……………BIT 0 ACK BIT
8-BIT DATA/AM
BIT 7…….…………BIT 0 ACK BIT
7-BIT SLAVE ID0ASADDRASS7-BIT SLAVE ID1AS
ADDRESS/COMMAND BYTEP
ADDR: 8-BIT REGISTER ADDRESS
S: 2-WIRE BUS START CONDITION BY MASTER
P: 2-WIRE BUS STOP CONDITION BY MASTER
AS: ACKNOWLEDGE BY SLAVE
AM: ACKNOWLEDGE BY MASTER
/AM: NO ACKNOWLEDGE BY MASTER
Figure 2. Single-Byte Write and Single-Byte Read
