BS85B12-3 HOLTEK [Holtek Semiconductor Inc], BS85B12-3 Datasheet - Page 39

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

BS85B12-3/BS85C20-3
Touch Key Flash MCU with LCD/LED Driver
Rev. 1.00
Bit 7, 6
Bit 5, 4
Bit 3, 2
Bit 1, 0
Name
POR
R/W
Internal Low Speed RC Oscillator - LIRC
Bit
CTRL Register
The Internal 32kHz System Oscillator is the low frequency oscillator. It is a fully integrated RC
oscillator with a typical frequency of 32kHz at 5V, requiring no external components for its
implementation. Device trimming during the manufacturing process and the inclusion of internal
frequency compensation circuits are used to ensure that the influence of the power supply voltage,
temperature and process variations on the oscillation frequency are minimised. After power on this
LIRC oscillator will be permanently enabled; there is no provision to disable the oscillator using
register bits.
unimplemented, read as 0
HIRCS1, HIRCS0: High frequency clock select
unimplemented, read as 0
D1, D0: These bits must be set to the binary value 00
7
00: 8MHz
01: 16MHz
10: 12MHz
11: 8MHz
6
HIRCS1
R/W
5
0
HIRCS0
R/W
33
4
0
3
2
R/W
D1
1
0
February 1, 2011
x unknown
R/W
D0
0
0