MAX17035(2009) 查看數據表（PDF） - Maxim Integrated
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MAX17035 Datasheet PDF : 27 Pages
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High-Frequency,
Low-Cost SMBus Chargers
Figures 4 and 5 show the timing diagrams for signals on
the SMBus interface. The address byte, command byte,
and data bytes are transmitted between the START and
STOP conditions. The SDA state is allowed to change
only while SCL is low, except for the START and STOP
conditions. Data is transmitted in 8-bit bytes and is
sampled on the rising edge of SCL. Nine clock cycles are
required to transfer each byte in or out of the MAX17035/
MAX17435/MAX17535 because either the master or the
slave acknowledges the receipt of the correct byte during
the ninth clock. The MAX17035/MAX17435/MAX17535
support the charger commands as described in Table 4.
a) Write-Word Format
S
SLAVE
ADDRESS
W
ACK
COMMAND
BYTE
ACK
LOW DATA
BYTE
ACK
7 bits 1b 1b
8 bits
1b
8 bits
1b
MSB LSB 0 0
MSB LSB
0 MSB LSB 0
PRESET TO
0b0001001
Relearn () = 0x3D
D7
D0
ChargingCurrent() = 0x14
ChargerVoltage() = 0x15
HIGH DATA
BYTE
ACK P
8 bits
1b
MSB LSB 0
D15
D8
b) Read-Word Format
S
SLAVE
ADDRESS
W
ACK
7 bits 1b 1b
MSB LSB 0 0
PRESET TO
0b0001001
COMMAND
BYTE
8 bits
MSB LSB
INP_Voltage () = 0x3E
ACK S
SLAVE
ADDRESS
R ACK
LOW DATA
BYTE
ACK
HIGH DATA
BYTE
NACK P
1b
7 bits 1b 1b
8 bits
1b
8 bits
1b
0
MSB LSB 1 0 MSB LSB 0 MSB LSB 1
PRESET TO
0b0001001
D7
D0
D15
D8
LEGEND:
S = START CONDITION OR REPEATED START CONDITION
ACK = ACKNOWLEDGE (LOGIC-LOW)
W = WRITE BIT (LOGIC-LOW)
MASTER TO SLAVE
SLAVE TO MASTER
P = STOP CONDITION
NACK = NOT ACKNOWLEDGE (LOGIC-HIGH)
R = READ BIT (LOGIC-HIGH)
Figure 3. SMBus Write-Word and Read-Word Protocols
A
B
C
D
EF
G
tLOW tHIGH
SMBCLK
SMBDATA
tSU:STA tHD:STA
A = START CONDITION
B = MSB OF ADDRESS CLOCKED INTO SLAVE
C = LSB OF ADDRESS CLOCKED INTO SLAVE
D = R/W BIT CLOCKED INTO SLAVE
E = SLAVE PULLS SMBDATA LINE LOW
tSU:DAT tHD:DAT
tHD:DAT
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER
G = MSB OF DATA CLOCKED INTO SLAVE
H = LSB OF DATA CLOCKED INTO SLAVE
I = SLAVE PULLS SMBDATA LINE LOW
Figure 4. SMBUs Write Timing
H
IJ
K
LM
tSU:STO tBUF
J = ACKNOWLEDGE CLOCKED INTO MASTER
K = ACKNOWLEDGE CLOCK PULSE
L = STOP CONDITION, DATA EXECUTED BY SLAVE
M = NEW START CONDITION
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