UPD78F1502AGK-GAK-AX Datasheet, PDF (486/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
14.4.2 Stopping the operation by channels
The stopping of the operation by channels is set using each of the following registers.
Figure 14-23. Each Register Setting When Stopping the Operation by Channels (1/2)
• Serial Channel Enable Status Register m (SEm) … This register indicates whether data
transmission/reception operation of each channel is enabled or stopped.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Sem
Sem3 Sem2 Sem1 Sem0
0 0 0 0 0 0 0 0 0 0 0 0 0/1 0/1 0/1 0/1
0: Operation stops
• The Sem register is a read-only status register, whose operation is stopped by using the STm register.
With a channel whose operation is stopped, the value of CKOmn of the Som register can be set by software.
• Serial channel stop register m (STm) … This register is a trigger register that is used to enable
stopping communication/count by each channel.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
STm
STm3 STm2 STm1 STm0
0 0 0 0 0 0 0 0 0 0 0 0 0/1 0/1 0/1 0/1
1: Clears Semn to 0 and stops the communication operation
* Because STmn is a trigger bit, it is cleared immediately when SEmn = 0.
(c) Serial output enable register m (SOEm) … This register is a register that is used to enable or stop
output of the serial communication operation of each channel.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SOE0
SOE02 SOE01 SOE00
0 0 0 0 0 0 0 0 0 0 0 0 0 0/1 0/1 0/1
0: Stops output by serial communication operation
* For channel n, whose serial output is stopped, the SO0n value of the SO0 register can be set by software.
SOE1
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SOE12
SOE10
0 0 0 0 0 0 0 0 0 0 0 0 0 0/1 0 0/1
0: Stops output by serial communication operation
* For channel n, whose serial output is stopped, the SO1n value of the SO1 register can be set by software.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3)
: Setting disabled (fixed by hardware), 0/1: Set to 0 or 1 depending on the usage of the user
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011