參數(shù)資料
型號: PIC16C505-20/P
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP14
封裝: 0.300 INCH, PLASTIC, DIP-14
文件頁數(shù): 5/85頁
文件大?。?/td> 1205K
代理商: PIC16C505-20/P
1999 Microchip Technology Inc.
DS40192C-page 13
PIC16C505
4.2.2
SPECIAL FUNCTION REGISTERS
The Special Function Registers (SFRs) are registers
used by the CPU and peripheral functions to control
the operation of the device (Table 4-1).
The Special Function Registers can be classified into
two sets. The Special Function Registers associated
with the “core” functions are described in this section.
Those related to the operation of the peripheral
features are described in the section for each
peripheral feature.
TABLE 4-1:
SPECIAL FUNCTION REGISTER (SFR) SUMMARY
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-On
Reset
Value on
All Other
Resets(2)
00h
INDF
Uses contents of FSR to address data memory (not a physical register)
xxxx xxxx
uuuu uuuu
01h
TMR0
8-bit real-time clock/counter
xxxx xxxx
uuuu uuuu
02h(1)
PCL
Low order 8 bits of PC
1111 1111
03h
STATUS
RBWUF
—PAO
TO
PD
ZDC
C
0001 1xxx
q00q quuu
(1)
04h
FSR
Indirect data memory address pointer
110x xxxx
11uu uuuu
05h
OSCCAL
CAL5
CAL4
CAL3
CAL2
CAL1
CAL0
1000 00--
uuuu uu--
N/A
TRISB
I/O control registers
--11 1111
N/A
TRISC
I/O control registers
--11 1111
N/A
OPTION
RBWU
RBPU
TOCS
TOSE
PSA
PS2
PS1
PS0
1111 1111
06h
PORTB
RB5
RB4
RB3
RB2
RB1
RB0
--xx xxxx
--uu uuuu
07h
PORTC
RC5
RC4
RC3
RC2
RC1
RC0
--xx xxxx
--uu uuuu
Legend: Shaded cells not used by Port Registers, read as ‘0’, — = unimplemented, read as ‘0’, x = unknown, u = unchanged,
q = depends on condition.
Note 1:
If reset was due to wake-up on pin change, then bit 7 = 1. All other rests will cause bit 7 = 0.
Note 2:
Other (non-power-up) resets include external reset through MCLR, watchdog timer and wake-up on pin change reset.
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