THCV235 datasheet(32/68 Pages) CEL

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THCV235_THCV236_Rev.3.40_E

THine Electronics, Inc.

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Security E

Table 30. Remote side 2-wire serial slave register Write Procedure for 16bit register address

Step

Description

R/W

Address

Set slave address of remote side 2-wire serial slave device (Low-order 7bits),

and enable this address (High-order 1bit).

0x04-0x0B

Write 1 or 0 and clear(auto clear) access status register (2WIRE_ACS_END_INT).

0x02 bit7

Set the data for remote side 2-wire serial slave to write (Max 16byte).

0x10-0x1F

Set slave address of access target 2-wire serial slave (choose the value set in

0x04-0x0B[6:0]), and set 1 to 0x20 bit7.

0x20

Set the byte number written to remote side 2-wire serial slave (Max 16byte).

(Byte number = register value + 1)

0x21

Set the low-order bits([7:0]) of start address of remote side 2-wire serial slave register

to write.

0x27

Set the high-order bits([15:8]) of start address of remote side 2-wire serial slave

0x28

Write 1 to WR_START_16B. (Start write access to remote side 2-wire serial slave

0x2B (*1)

(*2)

2-wire serial slave of Sub-Link Master perform clock stretching until remote side 2-wire

serial slave register access is completed.

(*3)

When write access is completed, 2WIRE_ACS_END_INT register value become 1

and interrupt occurs (INT=H → L).

If write access was normally ended, read value should be “0x1”.

0x02

Repeat from step2 to step10 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)

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