Datasheet

TC1320
DS21386C-page 8  2002-2012 Microchip Technology Inc.
FIGURE 4-1: TIMING DIAGRAMS
4.6 Register Set and Programmer’s
Model
TABLE 4-2: TC1320 COMMAND SET
(SMBus READ_BYTE AND
WRITE_BYTE)
TABLE 4-3: CONFIGURATION REGISTER
(CONFIG), 8-BIT, READ/WRITE
t
SU(START)
t
H(START)
t
SU-DATA
t
SU(STOP)
t
IDLE
A = START Condition
B = MSB of Address Clocked into Slave
C = LSB of Address Clocked into Slave
D = R/W Bit Clocked into Slave
A
SMBus Write Timing Diagram
SMBUS Read Timing Diagram
B
CDEFG H
IJ
K
E = Slave Pulls SDA Line Low
F = Acknowledge Bit Clocked into Master
G = MSB of Data Clocked into Master
H = LSB of Data Clocked into Master
I
LOW
I
HIGH
I = Acknowledge Clock Pulse
J = STOP Condition
K = New START Condition
SCL
SDA
t
SU(START)
t
H(START)
t
SU-DATA
t
H-DATA
t
SU(STOP )
t
IDLE
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 SDA Line Low
A
B
CDEFG H
I
J
KL
M
F = Acknowledge Bit Clocked into Master
G = MSB of Data Clocked into Slave
H = LSB of Data Clocked into Slave
I = Slave Pulls SDA Line Low
J = Acknowledge Clocked into Master
K = Acknowledge Clock Pulse
L = STOP Condition, Data Executed by Slave
M = New START Condition
I
LOW
I
HIGH
SCL
SDA
Command Byte Description
Command Code Function
RWD 00h Read/Write
Data (DATA)
RWCR 01h Read/Write
Configuration
(CONFIG)
Configuration Register (CONFIG)
D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
Reserved SHDN
Bit POR Function Type Operation
D[0] 0 Standby Switch Read/
Write
1 = Standby
0 = Normal
D[7]-D[1] 0 Reserved;
Always returns
Zero when Read
N/A N/A