Control Registers Of Serial Interface Channel 0 - NEC mPD780208 Subseries User Manual

13.3 Control Registers of Serial Interface Channel 0

The following four registers are used to control serial interface channel 0.
• Timer clock select register 3 (TCL3)
• Serial operating mode register 0 (CSIM0)
• Serial bus interface control register (SBIC)
• Interrupt timing specification register (SINT)
(1) Timer clock select register 3 (TCL3) (See Figure 13-2.)
This register sets the serial clock of serial interface channel 0.
TCL3 is set with an 8-bit memory manipulation instruction.
RESET input sets TCL3 to 88H.
Remark Besides setting the serial clock of serial interface channel 0, TCL3 sets the serial clock of serial
interface channel 1.
(2) Serial operating mode register 0 (CSIM0) (See Figure 13-3.)
This register sets the serial interface channel 0 serial clock, operating mode, operation enable/stop
wakeup function and displays the address comparator match signal.
CSIM0 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CSIM0 to 00H.
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. Stop the serial operation before
changing the operation mode.
CHAPTER 13 SERIAL INTERFACE CHANNEL 0
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