TTP258
TonTouchTM
Preliminary
§ Peripheral function description:
P-1: System clock pre-scale
The system clock almost is the most high frequency of MCU. For various peripherals,
application needs different clock source divided from system clock. TCPFS register is a
selector for choosing suitable frequency (FS).
TCPFS[20CH]: System clock pre-scale register[R/W], default value [0000]
Register
Bit Name
Read/Write
Bit3
Bit2
FS2
R/W
Bit1
FS1
R/W
Bit0
FS0
R/W
-
-
FS2~FS0: the selector value of TCPFS register
FS2 ~ FS0
FS
FS2 ~ FS0
FS
0
1
2
3
OSCH/1
OSCH/2
OSCH/4
OSCH/8
4
5
6
7
OSCH/16
OSCH/32
OSCH/64
OSCH/128
16’/04/06
Page 19 of 44
Ver.: 1.2
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