PIC16F57 Microchip Technology Inc., PIC16F57 Datasheet - Page 18

• Manufacturer Part Number: PIC16F57
• Description: Flash-based, 8-bit Cmos Microcontroller Series
• Manufacturer: Microchip Technology Inc.

PIC16F5X
3.2.2
The Special Function Registers (SFR) are registers
used by the CPU and peripheral functions to control the
operation of the device (Table 3-1).
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 3-1:
DS41213D-page 16
Address
N/A
N/A
00h
01h
02h
03h
04h
04h
04h
05h
06h
07h
08h
09h
Legend: Shaded cells = unimplemented or unused, – = unimplemented, read as ‘0’ (if applicable), x = unknown,
Note 1:
2:
3:
4:
5:
6:
7:
TRIS
OPTION
INDF
TMR0
PCL
STATUS
FSR
FSR
FSR
PORTA
PORTB
PORTC
PORTD
PORTE
u = unchanged
The upper byte of the Program Counter is not directly accessible. See Section 3.5 “Program Counter”
for an explanation of how to access these bits.
File address 07h is a General Purpose Register on the PIC16F54.
PIC16F54 only.
PIC16F57 only.
PIC16F59 only.
Unimplemented bits are read as ‘0’s.
File address 08h and 09h are General Purpose Registers on the PIC16F54 and PIC16F57.
SPECIAL FUNCTION REGISTERS
Name
(1)
(3)
(4)
(5)
SPECIAL FUNCTION REGISTER SUMMARY
(6)
(6), (7)
(2)
(7)
I/O Control Registers (TRISA, TRISB, TRISC, TRISD, TRISE)
Contains control bits to configure Timer0 and Timer0/WDT
prescaler
Uses contents of FSR to address data memory (not a physical
register)
Timer0 Module Register
Low order 8 bits of PC
Indirect data memory Address Pointer
Indirect data memory Address Pointer
Indirect data memory Address Pointer
Bit 7
RB7
RC7
RD7
RE7
PA2
—
Bit 6
RB6
RC6
RD6
RE6
PA1
—
Bit 5
RB5
RC5
RD5
RE5
PA0
—
Bit 4
RC4
RD4
RB4
RE4
TO
—
Bit 3
RA3
RB3
RC3
RD3
PD
—
Bit 2
RC2
RD2
RA2
RB2
—
Z
Bit 1
RC1
RD1
RA1
RB1
DC
—
Bit 0
RC0
RD0
RA0
RB0
—
C
© 2007 Microchip Technology Inc.
1111 1111
--11 1111
xxxx xxxx
xxxx xxxx
1111 1111
0001 1xxx
111x xxxx
1xxx xxxx
xxxx xxxx
---- xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx ----
Power-on
Value on
Reset
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