UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 257

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

13.4 Operation of Serial Interface
13.4.1 Operation stop mode
(1) Register settings
This section explains the two modes of serial interface SIO3.
Because serial transfer is not performed during this mode, the power consumption can be reduced.
In addition, pins can be used as normal I/O ports.
Operation stop mode is set by serial operation mode register 3 (CSIM3).
CSIM3 can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CSIM3 to 00H.
Notes 1. When CSIE3 = 0 (SIO3 operation stopped), the SI, SO, and SCK pins can be used for port functions.
CSIM3
Symbol
2. When CSIE3 = 1 (SIO3 operation enabled), if only the transmit function is used, the SI pin can be used
for a port function, and in the receive-only mode, the SO pin can be used for a port function.
CSIE3
7
CSIE3
0
1
6
0
Operation disabled
Operation enabled
Shift register operation
0
5
4
0
CHAPTER 13 SERIAL INTERFACE SIO3
0
3
User’s Manual U13029EJ7V1UD
MODE SCL31SCL30
2
Enable/disable specification for SIO3
Cleared
Count operation enabled
1
Serial counter
0
Address
FFB0H
Port function
Serial function + port function
After reset
00H
Port
Note 1
R/W
R/W
Note 2
255