C8051F336_08 Datasheet, PDF (181/227 Pages) Silicon Laboratories – Mixed-Signal Byte-Programmable EPROM MCU

C8051F336/7/8/9
SFR Definition 24.1. CKCON: Clock Control
Bit
Name
Type
Reset
7
T3MH
R/W
0
6
T3ML
R/W
0
5
T2MH
R/W
0
4
T2ML
R/W
0
3
T1M
R/W
0
2
T0M
R/W
0
1
0
SCA[1:0]
R/W
0
0
SFR Address = 0x8E
Bit Name
Function
7 T3MH _{Timer 3 High Byte Clock Select.}
Selects the clock supplied to the Timer 3 high byte (split 8-bit timer mode only).
0: Timer 3 high byte uses the clock defined by the T3XCLK bit in TMR3CN.
1: Timer 3 high byte uses the system clock.
6 T3ML _{Timer 3 Low Byte Clock Select.}
Selects the clock supplied to Timer 3. Selects the clock supplied to the lower 8-bit timer
in split 8-bit timer mode.
0: Timer 3 low byte uses the clock defined by the T3XCLK bit in TMR3CN.
1: Timer 3 low byte uses the system clock.
5 T2MH _{Timer 2 High Byte Clock Select.}
Selects the clock supplied to the Timer 2 high byte (split 8-bit timer mode only).
0: Timer 2 high byte uses the clock defined by the T2XCLK bit in TMR2CN.
1: Timer 2 high byte uses the system clock.
4 T2ML _{Timer 2 Low Byte Clock Select.}
Selects the clock supplied to Timer 2. If Timer 2 is configured in split 8-bit timer mode,
this bit selects the clock supplied to the lower 8-bit timer.
0: Timer 2 low byte uses the clock defined by the T2XCLK bit in TMR2CN.
1: Timer 2 low byte uses the system clock.
3
T1 _{Timer 1 Clock Select.}
Selects the clock source supplied to Timer 1. Ignored when C/T1 is set to ’1’.
0: Timer 1 uses the clock defined by the prescale bits SCA[1:0].
1: Timer 1 uses the system clock.
2
T0 _{Timer 0 Clock Select.}
Selects the clock source supplied to Timer 0. Ignored when C/T0 is set to ’1’.
0: Counter/Timer 0 uses the clock defined by the prescale bits SCA[1:0].
1: Counter/Timer 0 uses the system clock.
1:0 SCA[1:0] _{Timer 0/1 Prescale Bits.}
These bits control the Timer 0/1 Clock Prescaler:
00: System clock divided by 12
01: System clock divided by 4
10: System clock divided by 48
11: External clock divided by 8 (synchronized with the system clock)
Rev.1.0
181