CHAPTER 15 SERIAL INTERFACE CSI10
Preliminary User’s Manual U16315EJ1V0UD
315
15.4 Operation of Serial Interface CSI10
Serial interface CSI10 can be used in the following two modes.
•
Operation stop mode
•
3-wire serial I/O mode
15.4.1 Operation stop mode
Serial transfer is not executed in this mode. Therefore, the power consumption can be reduced. In addition, the
P10/SCK10/T
X
D0, P11/SI10/R
X
D0, and P12/SO10 pins can be used as ordinary I/O port pins in this mode.
(1) Register setting
The operation stop mode is set by serial operation mode register 10 (CSIM10).
(a) Serial operation mode register 10 (CSIM10)
CSIM10 can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears CSIM10 to 00H.
Address: FF80H After reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
CSIM10
CSIE10
TRMD10
0
DIR10
0
0
0
CSOT10
CSIE10
Operation control in 3-wire serial I/O mode
0
Stops operation (SI10/P11/R
X
D0, SO10/P12, and SCK10/P10/T
X
D0 pins can be used as general-
purpose port pins).
1
Enables operation (SI10/P11/R
X
D0, SO10/P12, and SCK10/P10/T
X
D0 pins are at active level).
Содержание 78K0/KD1 Series
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