184
CHAPTER 15 SERIAL INTERFACE SIO3
15.2 SIO3 Configuration
The SIO3 consists of the following hardware.
Table 15-1. SIO3 Configuration
Item
Configuration
Register
Serial I/O shift register (SIO)
Control register
Serial operation mode register (CSIM)
(1) Serial I/O shift register (SIO)
This is an 8-bit register that performs parallel-serial conversion and serial transmit/receive (shift operations)
synchronized with the serial clock.
SIO is set with an 8-bit memory manipulation instruction.
When “1” is set to bit 7 (CSIE) of the serial operation mode register (CSIM), a serial operation can be started
by writing data to or reading data from SIO.
When transmitting, data written to SIO is output via the serial output (SO).
When receiving, data is read from the serial input (SI) and written to SIO.
The RESET signal resets the register value to 00H.
Caution
Do not access SIO during a transfer operation unless the access is triggered by a transfer
start (Read is disabled when MODE = 0 and write is disabled when MODE = 1).
Содержание mPD780973 Series
Страница 2: ...2 MEMO ...
Страница 66: ...66 MEMO ...
Страница 98: ...98 MEMO ...
Страница 138: ...138 MEMO ...
Страница 164: ...164 MEMO ...
Страница 182: ...182 MEMO ...
Страница 204: ...204 MEMO ...
Страница 244: ...244 MEMO ...
Страница 262: ...262 MEMO ...
Страница 278: ...278 MEMO ...
Страница 290: ...290 MEMO ...