THCV231 datasheet(17/56 Pages) THINE

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THCV231_THCV236_Rev.2.30_E

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Sub-Link Mode Setting

2-wire serial I/F Mode

2-wire serial I/F Mode enables register access, using GPIO (General Purpose Input/Output) pin and interrupt

function. Sub-Link Master device has 2-wire serial slave block and can be connected to HOST MPU, Sub-Link

Slave device has 2-wire serial master block and can be connected to remote side 2-wire serial slave devices.

HOST MPU can access register of Sub-Link Master device, Sub-Link Slave device and remote side 2-wire

serial slave devices.

2-wire serial I/F Device ID setting

AIN1 and AIN0 pins determine Device ID setting of the THCV236. Only Sub-Link Master device has AIN1

and AIN0 pin. AIN1 and AIN0 choose one of 4 addresses which give an identification address to the THCV236

under 2-wire serial interface bus topology.

Table 18. 2-wire serial I/F Device ID select (Sub-Link Master device Only)

AIN1

AIN0

Device ID

0x0B

0x34

0x77

0x65

2-wire serial I/F Clock Stretching

In principle, when Sub-Link bridges 2-wire serial interface communication from Sub-Link Master to Sub-Link

Slave or remote side 2-wire serial slave devices, time lag occurs between HOST MPU side 2-wire serial access

and Sub-Link Slave internal bus access or remote side 2-wire serial access.

2WIRE_MODE (Sub-Link Master side register, 0x0F bit1-0) selects whether 2-wire serial slave of Sub-Link

Master perform clock stretching or not.

When 2WIRE_MODE = 00, Sub-Link Master device wait HOST MPU until Sub-Link Slave register access or

remote side 2-wire serial slave register access is completed by clock stretching.

When 2WIRE_MODE = 01, Sub-Link Master device informs HOST MPU that Sub-Link Slave register access

or remote side 2-wire serial register access has been completed by interruption (INT pin) without clock

stretching.

THCV231 Datasheet(PDF) 17 Page - THine Electronics, Inc.