
THCV242_ Rev.2.00_E
Copyright
©
2019 THine Electronics, Inc. THine Electronics, Inc.
15/53
Security E
2-wire serial Read/Write access to local Register
HOST MPU can directly access THCV242 local register by 2-wire serial I/F.
Figure 3.
Host to THCV242 local register access configuration
Figure 4.
2-wire serial I/F write to THCV242 local register protocol
Figure 5.
2-wire serial I/F read to THCV242 local register protocol
Sub-Link
Master
THCV242
Sub-Link Block
Registe r
2-wire
Slave
Host
MPU
SCL
AIN<1:0> = Use r S elect
SDA
S
Register address MSB
Device ID
W A
S
P
A
A
W
Start condition
Stop condition
ACK
NACK
Write command indicator
Access from 2-wire serial interface Master
Access from 2-wire serial interface Slave
Register address LSB
A
A
Write data #1
A
...
A P
S
Register address MSB
Device ID
W A
S
P
A
A
W
R
Start condition
Stop condition
ACK
NACK
Read command indicator
Write command indicator
Access from 2-wire serial interface Master
Access from 2-wire serial interface Slave
Repeated start condition
Sr
Register address LSB
A
A
Read data #1
A
...
P
Device ID
R A
Sr
A