THCV231 datasheet(22/56 Pages) THINE

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THCV231_THCV236_Rev.2.30_E

THine Electronics, Inc.

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Security E

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 Block

2-wire

Slave

Sub-Link

Master

Sub-Link

Master Device

Sub-Link

Slave Device

Sub-Link Block

Sub-Link

Slave

2-wire

Master

Sub-Link

line

I2C

Slave

Device#7

・

I2C

Slave

Device#0

LOCKN/

MSSEL=0

AIN1,AIN0 = User Select

Interrupt signal

Host

MPU

SD1(SCL)

SD0(SDA)

INT

(Address

0x00 – 0x7F)

(Address

0x80 – 0xFF)

SCL

SDA

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),

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 0 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 start address of remote side 2-wire serial slave register to write.

0x23

Write 1 to WR_START_8B. (Start write access to remote side 2-wire serial slave

0x25 (*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 wire access was normally ended, read value should be “0x1”.

0x02

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)

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