THCV235-Q_THCV236-Q_Rev.3.40_E
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2016 THine Electronics, Inc.
THine Electronics, Inc.
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Security E
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.
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.
Figure 8.
2WIRE_MODE Operation
