參數(shù)資料
型號: PIC16C54C
廠商: Microchip Technology Inc.
英文描述: EPROM/ROM-Based 8-Bit CMOS Microcontroller(18引腳、12個I/O端口、512位EPROM/ROM的8位CMOS微控制器)
中文描述: 存儲器/基于ROM的8位CMOS微控制器(18引腳,12個的I / O,512位存儲器端口/光盤的8位的CMOS微控制器)
文件頁數(shù): 20/158頁
文件大?。?/td> 1194K
代理商: PIC16C54C
PIC16C5X
DS30453C-page 20
Preliminary
2000 Microchip Technology Inc.
4.4
OPTION Register
The OPTION Register is a 6-bit wide, write-only regis-
ter which contains various control bits to configure the
Timer0/WDT prescaler and Timer0.
By executing the
OPTION
instruction, the contents of
the W Register will be transferred to the OPTION Reg-
ister. A RESET sets the OPTION<5:0> bits.
REGISTER 4-2:
OPTION REGISTER
U-0
U-0
6
W-1
T0CS
5
W-1
T0SE
4
W-1
PSA
3
W-1
PS2
2
W-1
PS1
1
W-1
PS0
W = Writable bit
U
= Unimplemented bit
- n = Value at POR reset
bit7
bit0
bit 7-6:
Unimplemented
.
bit 5:
T0CS
: Timer0 clock source select bit
1
= Transition on T0CKI pin
0
= Internal instruction cycle clock (CLKOUT)
bit 4:
T0SE
: Timer0 source edge select bit
1
= Increment on high-to-low transition on T0CKI pin
0
= Increment on low-to-high transition on T0CKI pin
bit 3:
PSA
: Prescaler assignment bit
1
= Prescaler assigned to the WDT
0
= Prescaler assigned to Timer0
bit 2-0:
PS<2:0>
: Prescaler rate select bits
000
001
010
011
100
101
110
111
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
Bit Value
Timer0 Rate
WDT Rate
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PIC16C54A EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O口有20mA吸收,25mA驅(qū)動,12個I/O,2.5V的微控制器)
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