
265
CHAPTER 15 SERIAL INTERFACE CHANNEL 0 (
μ
PD78018F SUBSERIES)
15.3 Registers Controlling Serial Interface Channel 0
The following four types of registers control serial interface channel 0:
Timer clock select register 3 (TCL3)
Serial operation mode register 0 (CSIM0)
Serial bus interface control register (SBIC)
Interrupt timing specification register (SINT)
(1) Timer clock select register 3 (TCL3) (refer to Figure 15-2)
This register sets the serial clock of serial interface channel 0.
TCL3 is set by an 8-bit memory manipulation instruction.
This register is set to 88H when the RESET signal is input.
Remark
TCL3 also has a function to set the serial clock of serial interface channel 1 in addition to the function
to set the serial clock of serial interface channel 0.
(2) Serial operation mode register 0 (CSIM0) (refer to Figure 15-3)
This register sets the serial clock and operation mode of serial interface channel 0, enables/disables the
operation of the interface, sets the wake-up function, and indicates the coincidence signal of the address
comparator.
CSIM0 is set by a 1-bit or 8-bit memory manipulation instruction.
This register is set to 00H when the RESET signal is input.
Caution
Do not change the operation mode (3-wire serial I/O, 2-wire serial I/O, or SBI) while the
operation of serial interface channel 0 is enabled. To change the operation mode, stop the
serial operation.