Datasheet

RL78/L12 CHAPTER 12 SERIAL ARRAY UNIT

R01UH0330EJ0200 Rev.2.00 401

Dec 13, 2013

12.3.11 Serial output enable register m (SOEm)

The SOEm register is a register that is used to enable or stop output of the serial communication operation of each

channel.

Channel n that enables serial output cannot rewrite by software the value of the SOmn bit of serial output register m

(SOm) to be described below, and a value reflected by a communication operation is output from the serial data output pin.

For channel n, whose serial output is stopped, the SOmn bit value of the SOm register can be set by software, and that

value can be output from the serial data output pin. In this way, any waveform of the start condition and stop condition can

be created by software.

The SOEm register can be set by a 16-bit memory manipulation instruction.

The lower 8 bits of the SOEm register can be set with a 1-bit or 8-bit memory manipulation instruction with SOEmL.

Reset signal generation clears the SOEm register to 0000H.

Figure 12-13. Format of Serial Output Enable Register m (SOEm)

Address: F012AH, F012BH After reset: 0000H R/W

Symbol 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

SOE0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

SOE

Serial output enable/stop of channel n

0 Stops output by serial communication operation.

1 Enables output by serial communication operation.

Caution Be sure to clear bits 15 to 2 to “0”.

Remark m: Unit number (m = 0), n: Channel number (n = 0, 1)