MEMORY MAP KS57C2308/P2308/C2316/P2316
4-28
TMOD0 — Timer/Counter 0 Mode Register F91H, F90H
Bit 76543210
Identifier "0" .6 .5 .4 .3 .2 "0" "0"
RESET Value 00000000
Read/Write WWWWWWWW
Bit Addressing 88881/8 888
.7 Bit 7
0Always logic zero
.6–.4 Timer/Counter 0 Input Clock Selection Bits
000External clock input at TCL0 pin on rising edge
001External clock input at TCL0 pin on falling edge
100fxx/210 (4.09 kHz)
101fxx/28 (16.4 kHz)
110fxx/26 (65.5 kHz)
111fxx/24 (262 kHz)
NOTE: fxx” = Selected system clock of 4.19 MHz
.3 Clear Counter and Resume Counting Control Bit
1Clear TCNT0, IRQT0, and TOL0 and resume counting immediately
(This bit is cleared automatically when counting starts.)
.2 Enable/Disable Timer/Counter 0 Bit
0Disable timer/counter 0; retain TCNT0 contents
1Enable timer/counter 0
.1–.0 Bit 1–0
0Always logic zero