PIC16F1938 Datasheet, PDF (49/452 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers

PIC16(L)F1938/9
TABLE 3-10: SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Value on all
other
Resets
Bank 31
F80h⁽²⁾ INDF0
F81h⁽²⁾ INDF1
F82h⁽²⁾ PCL
F83h⁽²⁾ STATUS
F84h⁽²⁾ FSR0L
F85h⁽²⁾ FSR0H
F86h⁽²⁾ FSR1L
F87h⁽²⁾ FSR1H
F88h⁽²⁾ BSR
F89h⁽²⁾ WREG
F8Ah^(1),(2 PCLATH
)
Addressing this location uses contents of FSR0H/FSR0L to Address Data Memory
(not a physical register)
Addressing this location uses contents of FSR1H/FSR1L to Address Data Memory
(not a physical register)
Program Counter (PC) Least Significant Byte
—
—
—
TO
PD
Z
DC
Indirect Data Memory Address 0 Low Pointer
Indirect Data Memory Address 0 High Pointer
Indirect Data Memory Address 1 Low Pointer
Indirect Data Memory Address 1 High Pointer
—
—
—
BSR<4:0>
Working Register
—
Write Buffer for the upper 7 bits of the Program Counter
xxxx xxxx xxxx xxxx
xxxx xxxx xxxx xxxx
0000 0000 0000 0000
C
---1 1000 ---q quuu
0000 0000 uuuu uuuu
0000 0000 0000 0000
0000 0000 uuuu uuuu
0000 0000 0000 0000
---0 0000 ---0 0000
0000 0000 uuuu uuuu
-000 0000 -000 0000
F8Bh⁽²⁾
F8Ch
—
FE3h
FE4h
FE5h
INTCON
—
STATUS_
SHAD
WREG_
SHAD
GIE
PEIE
Unimplemented
TMR0IE
INTE
Working Register Normal (Non-ICD) Shadow
IOCIE
TMR0IF
INTF
IOCIF 0000 0000 0000 0000
—
—
Z_SHAD DC_SHAD C_SHAD ---- -xxx ---- -uuu
xxxx xxxx uuuu uuuu
FE6h
FE7h
FE8h
BSR_
SHAD
PCLATH_
SHAD
FSR0L_
SHAD
Bank Select Register Normal (Non-ICD) Shadow
Program Counter Latch High Register Normal (Non-ICD) Shadow
Indirect Data Memory Address 0 Low Pointer Normal (Non-ICD) Shadow
---x xxxx ---u uuuu
-xxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
FE9h
FEAh
FEBh
FSR0H_
SHAD
FSR1L_
SHAD
FSR1H_
SHAD
Indirect Data Memory Address 0 High Pointer Normal (Non-ICD) Shadow
Indirect Data Memory Address 1 Low Pointer Normal (Non-ICD) Shadow
Indirect Data Memory Address 1 High Pointer Normal (Non-ICD) Shadow
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
FECh
—
Unimplemented
—
—
FEDh
STKPTR
—
—
—
Current Stack Pointer
---1 1111 ---1 1111
FEEh
TOSL
Top of Stack Low byte
xxxx xxxx uuuu uuuu
FEFh
TOSH
—
Top of Stack High byte
-xxx xxxx -uuu uuuu
Legend:
Note 1:
2:
3:
4:
x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as ‘0’, r = reserved.
Shaded locations are unimplemented, read as ‘0’.
The upper byte of the program counter is not directly accessible. PCLATH is a holding register for the PC<14:8>, whose contents are transferred
to the upper byte of the program counter.
These registers can be addressed from any bank.
These registers/bits are not implemented on PIC16(L)F1938 devices, read as ‘0’.
Unimplemented, read as ‘1’.
 2011 Microchip Technology Inc.
Preliminary
DS41574A-page 49