Toshiba TLCS-90 Series Data Book page 321

8 bit microcontroller

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For the wake-up operation, P33 should be always selected as the

TxD pin of the slave controllers,

in the open drain

output mode.

Fig. 3.8 (14)

Serial Link Using Wake-up Function MPU90-137

Select the 9-bit UART mode for the master and slave controllers.

select code for the slave controllers.

The MSB (bit 8) is set to "1".

select code of slave controller.

Each slave controller receives the above frame, and clears the WU bit

to "0" if the above select code matches its own select code.

The master controller transmits data to the specified slave controller

(whose WU bit is cleared to "0").

At the same time, the MSB (bit 8)

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