PIC12F508-I/SL View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC12F508-I/SL Datasheet PDF : 110 Pages
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PIC12F508/509/16F505
4.3.2 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 (PIC12F508/509)
Address Name
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
Bit 2 Bit 1 Bit 0
Value on
Power-On
Reset(2)
Page #
00h
01h
02h(1)
03h
04h
04h(4)
05h
06h
N/A
INDF
Uses Contents of FSR to Address Data Memory (not a physical
register)
xxxx xxxx
28
TMR0 8-bit Real-Time Clock/Counter
xxxx xxxx
35
PCL
Low-order 8 bits of PC
STATUS GPWUF — PA0(5) TO
PD
1111 1111
27
Z
DC C
0-01 1xxx(3) 22
FSR
Indirect Data Memory Address Pointer
111x xxxx
28
FSR
Indirect Data Memory Address Pointer
110x xxxx
28
OSCCAL CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 — 1111 111-
26
GPIO
—
— GP5 GP4 GP3 GP2 GP1 GP0 --xx xxxx
31
TRISGPIO —
— I/O Control Register
--11 1111
31
N/A
OPTION GPWU GPPU TOCS TOSE PSA
PS2 PS1 PS0 1111 1111
24
Legend: – = unimplemented, read as ‘0’, x = unknown, u = unchanged, q = value depends on condition.
Note 1: The upper byte of the Program Counter is not directly accessible. See Section 4.7 “Program Counter”
for an explanation of how to access these bits.
2: Other (non Power-up) Resets include external Reset through MCLR, Watchdog Timer and wake-up on pin
change Reset.
3: If Reset was due to wake-up on pin change, then bit 7 = 1. All other Resets will cause bit 7 = 0.
4: PIC12F509 only.
5: This bit is used on the PIC12F509. For code compatibility do not use this bit on the PIC12F508.
DS41236E-page 20
© 2009 Microchip Technology Inc.
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