KS57C2308/P2308/C2316/P2316 TIMERS and TIMER/COUNTERS
11-3
Table 11-1. Basic Timer Register Overview
Register
Name Type Description Size RAM
Address Addressing
Mode Reset
Value
BMOD Control Controls the clock frequency
(mode) of the basic timer; also, the
oscillation stabilization interval after
power-down mode release or RESET
4-bit F85H 4-bit write-only;
BMOD.3: 1-bit
write-only
“0”
BCNT Counter Counts clock pulses matching the
BMOD frequency setting 8-bit F86H–F87H 8-bit read-
only “U”
(note)
WDMOD Control Controls watchdog timer operation. 8-bit F98H–F99H 8-bit write-only A5H
WDTCF Control Clear the watchdog timer’s counter. 1-bit F9AH.3 1-bit write-only “0”
NOTE: “U” means that the value is undetermined after a RESET.
"Clear" Signal
Bits
Instruction
Clock
Selector IRQB
Interrupt
RequestOverflow
CPU Clock Start Signals
(By Interrupts)
1-Bit R/W
Clock Input
Clear
IRQB
4
Clear
BCNT
BMOD.3
BMOD.2
BMOD.1
BMOD.0 8
WDTCNT Reset
Generation
8
WDTCF DELAY
WAIT RESET
Stop Bits
Instruction
RESET
C
Clear
Overflow
1 pulse period = BT input clock 2 (1/2 duty)
3-Bit Counter
8
NOTE: WAIT means stabilization time
after or Stabilization
time after STOP mode release.
RESET
Bit5
(By )
BCNT
WDMOD
RESET
Figure 11-1. Basic Timer Circuit Diagram