upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 311

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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15.4 Operation of Serial Interface CSI10
15.4.1 Operation stop mode
the P10/SCK10/T
(1) Register used
Address: FF80H After reset: 00H R/W
CSIM10
Serial interface CSI10 can be used in the following two modes.
• Operation stop mode
• 3-wire serial I/O mode
Serial communication is not executed in this mode. Therefore, the power consumption can be reduced. In addition,
Symbol
The operation stop mode is set by serial operation mode register 10 (CSIM10).
To set the operation stop mode, clear bit 7 (CSIE10) of CSIM10 to 0.
(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.
Notes 1.
CSIE10
CSIE10
2.
X
<7>
D0, P11/SI10/R
0
To use P10/SCK10/TxD0, P11/SI10/RxD0, and P12/SO10 as general-purpose ports, set
CSIM10 in the default status (00H).
Bit 0 (CSOT10) of CSIM10 and serial I/O shift register 10 (SIO10) are reset.
Disables operation
TRMD10
6
X
D0, and P12/SO10 pins can be used as ordinary I/O port pins in this mode.
CHAPTER 15 SERIAL INTERFACE CSI10
Note 1
5
0
User’s Manual U16962EJ3V0UD
and asynchronously resets the internal circuit
Operation control in 3-wire serial I/O mode
DIR10
4
3
0
2
0
Note 2
.
1
0
CSOT10
0
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