THCV236 datasheet(34/68 Pages) CEL

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THCV235_THCV236_Rev.3.40_E

THine Electronics, Inc.

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Security E

Table 32. Remote side 2-wire serial slave register Read 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 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 read from remote side 2-wire serial slave(Max 16byte).

0x22

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

read.

0x29

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

to read.

0x2A

Write 1 to RD_START_16B. (Start read access to remote side 2-wire serial slave register)

0x2C (*1)

(*2)

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

data is stored in Sub-Link Master register (Address 0x10-0x1F).

(*3)

When read access is completed, read data is stored in Sub-Link Master register (Address

0x10-0x1F) and 2WIRE_ACS_END_INT register value become 1 and interrupt occurs

(INT=H → L).

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

0x02

HOST MPU read data stored in Sub-Link Master register.

0x10-0x1F

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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