THCV231_16 Datasheet, PDF (22/56 Pages) THine Electronics, Inc. – The THCV231 and THCV236 are designed to support video data transmission between the host and display.

Read/Write access to remote side 2-wire serial slave devices connected to Sub-Link Slave Device
HOST MPU can access to remote side 2-wire serial slave register via Sub-Link Master and Sub-Link Slave by
Sub-Link Master register settings. Sub-Link Slave has 2-wire serial master block. Up to 8 devices are
connectable to 2-wire serial master of Sub-Link Slave device.
Sub-Link Slave Device
Sub-Link Master Device
I2C
Slave
Device#0
・
・
I2C
Slave
Device#7
SCL
SDA
Sub-Link Block
2-wire
Master
Sub-Link
Slave
Register
(Address
0x80 – 0xFF)
Sub-Link
line
Sub-Link Block
Sub-Link
Master
2-wire
Slave
Register
(Address
0x00 – 0x7F)
SD1(SCL)
SD0(SDA)
INT
Host
MPU
Interrupt signal
LOCKN/MSSEL=0 AIN1,AIN0 = User Select
Figure 10. Host to 2-wire serial Slave devices connected to Sub-Link Slave device access configuration
Table 21. Remote side 2-wire serial slave register Write Procedure for 8bit register address
Step
Description
R/W Address
Set slave address of remote side 2-wire serial slave device (Low-order 7bits),
1
and enable this address (High-order 1bit).
W 0x04-0x0B
2 Write 1 or 0 and clear(auto clear) access status register (2WIRE_ACS_END_INT).
W 0x02 bit7
3 Set the data for remote side 2-wire serial slave to write (Max 16byte).
W 0x10-0x1F
Set slave address of access target 2-wire serial slave (choose the value set in
4
W
0x04-0x0B[6:0]), and set 0 to 0x20 bit7.
0x20
Set the byte number written to remote side 2-wire serial slave (Max 16byte).
5
(Byte number = register value + 1)
W
0x21
6 Set the start address of remote side 2-wire serial slave register to write.
W
0x23
Write 1 to WR_START_8B. (Start write access to remote side 2-wire serial slave
7
W
register)
0x25 (*1)
8 2-wire serial slave of Sub-Link Master perform clock stretching until remote side
-
-
(*2) 2-wire serial slave register access is completed.
8 When write access is completed, 2WIRE_ACS_END_INT register value become 1
-
-
(*3) and interrupt occurs (INT=H → L).
9 If wire access was normally ended, read value should be “0x1”.
R
0x02
10 Repeat from step2 to step9 if needed.
-
-
*1 It’s Prohibit that HOST MPU start access to Sub-Link Slave or remote 2-wire serial slave before the previous access to
Sub-Link Slave or remote side 2-wire serial slave is completed.
*2 When 2WIRE_MODE = 00 (Clock Stretching Mode)
*3 When 2WIRE_MODE = 01 (No Clock Stretching Mode)
THCV231_THCV236_Rev.2.30_E
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