参数资料
型号: PIC16C621-20/SS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDSO20
封装: 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件页数: 63/121页
文件大小: 1202K
代理商: PIC16C621-20/SS
PIC16C62X
DS30235H-page 46
1999 Microchip Technology Inc.
9.1
Configuration Bits
The configuration bits can be programmed (read as ’0’)
or left unprogrammed (read as ’1’) to select various
device configurations. These bits are mapped in
program memory location 2007h.
The user will note that address 2007h is beyond
the user program memory space. In fact, it belongs
to the special
test/configuration
memory
space
(2000h – 3FFFh), which can be accessed only during
programming.
FIGURE 9-1:
CONFIGURATION WORD
CP1
CP0
(2)
CP1
CP0
(2)
CP1
CP0
(2)
—BODEN
(1)
CP1
CP0
(2) PWRTE(1) WDTE F0SC1 F0SC0
CONFIG
Address
REGISTER:
2007h
bit13
bit0
bit 13-8, CP<1:0>: Code protection bit pairs(2)
5-4:
Code protection for 2K program memory
11
= Program memory code protection off
10
= 0400h-07FFh code protected
01
= 0200h-07FFh code protected
00
= 0000h-07FFh code protected
Code protection for 1K program memory
11
= Program memory code protection off
10
= Program memory code protection off
01
= 0200h-03FFh code protected
00
= 0000h-03FFh code protected
Code protection for 0.5K program memory
11
= Program memory code protection off
10
= Program memory code protection off
01
= Program memory code protection off
00
= 0000h-01FFh code protected
bit 7:
Unimplemented: Read as ’1’
bit 6:
BODEN: Brown-out Reset Enable bit (1)
1
= BOR enabled
0
= BOR disabled
bit 3:
PWRTE: Power-up Timer Enable bit (1, 3)
1
= PWRT disabled
0
= PWRT enabled
bit 2:
WDTE: Watchdog Timer Enable bit
1
= WDT enabled
0
= WDT disabled
bit 1-0:
FOSC1:FOSC0: Oscillator Selection bits
11
= RC oscillator
10
= HS oscillator
01
= XT oscillator
00
= LP oscillator
Note 1:
Enabling Brown-out Reset automatically enables Power-up Timer (PWRT), regardless of the value of bit PWRTE. We
recommend that whenever Brown-out Reset is enabled, the Power-up Timer is also enabled.
Note 2:
All of the CP<1:0> pairs have to be given the same value to enable the code protection scheme listed.
Note 3:
Unprogrammed parts default the Power-up Timer disabled.
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