BS85B12-3 HOLTEK [Holtek Semiconductor Inc], BS85B12-3 Datasheet - Page 132

• Manufacturer Part Number: BS85B12-3
• Description: Touch Key Flash Type 8-Bit MCU with LCD/LED Driver
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Peripheral Clock Output
Rev. 1.00
Bit 7~5
Bit 4
Bit 3~2
Bit 1
Bit 0
Name
POR
R/W
Peripheral Clock Operation
Bit
SIMC0 Register
The Peripheral Clock Output allows the device to supply external hardware with a clock signal
synchronised to the microcontroller clock.
As the peripheral clock output pin, PCK, is shared with I/O line, the required pin function is chosen via
PCKEN in the SIMC0 register. The Peripheral Clock function is controlled using the SIMC0 register.
The clock source for the Peripheral Clock Output can originate from either the TM0 CCRP match
frequency/2 or a divided ratio of the internal f
overall on/off control, setting PCKEN bit to 1 enables the Peripheral Clock, setting PCKEN bit to
bits in the same register. If the device enters the SLEEP Mode this will disable the Peripheral Clock
output.
0 disables it. The required division ratio of the system clock is selected using the PCKP1 and PCKP0
SIM2
R/W
SIM2~SIM0: SIM Operating Mode Control
PCKEN: PCK Output Pin Control
PCKPSC1, PCKPSC0: Select PCK output pin frequency
SIMEN: SIM Control
Unimplemented, read as 0
7
1
Described elsewhere
0: disable
1: enable
0: f
1: f
2: f
3: TM0 CCRP match frequency/2
Described elsewhere
SYS
SYS
SYS
/4
/8
Touch Key Flash MCU with LCD/LED Driver
SIM1
R/W
6
1
SIM0
R/W
5
1
PCKEN
R/W
126
4
0
SYS
clock. The PCKEN bit in the SIMC0 register is the
PCKPSC1 PCKPSC0
R/W
3
0
BS85B12-3/BS85C20-3
R/W
2
0
SIMEN
R/W
1
0
February 1, 2011
0