PIC16C71X
DS30272A-page 12
1997 Microchip Technology Inc.
4.2
Data Memory Organization
The data memory is partitioned into two Banks which
contain the General Purpose Registers and the Special
Function Registers. Bit RP0 is the bank select bit.
RP0 (STATUS<5>) = 1
→ Bank 1
RP0 (STATUS<5>) = 0
→ Bank 0
Each Bank extends up to 7Fh (128 bytes). The lower
locations of each Bank are reserved for the Special
Function Registers. Above the Special Function Regis-
ters are General Purpose Registers implemented as
static RAM. Both Bank 0 and Bank 1 contain special
function registers. Some "high use" special function
registers from Bank 0 are mirrored in Bank 1 for code
reduction and quicker access.
4.2.1
GENERAL PURPOSE REGISTER FILE
The register le can be accessed either directly, or indi-
rectly
through
the
File
Select
Register
FSR
FIGURE 4-4:
PIC16C710/71 REGISTER FILE
MAP
INDF(1)
TMR0
PCL
STATUS
FSR
PORTA
PORTB
PCLATH
INTCON
ADRES
ADCON0
INDF(1)
OPTION
PCL
STATUS
FSR
TRISA
TRISB
PCLATH
INTCON
ADCON1
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
80h
81h
82h
83h
84h
85h
86h
87h
88h
89h
8Ah
8Bh
8Ch
General
Purpose
Register
7Fh
FFh
Bank 0
Bank 1
File
Address
ADRES
2Fh
30h
AFh
B0h
File
Address
General
Purpose
Register
Mapped
in Bank 0(3)
PCON(2)
Unimplemented data memory locations, read
as '0'.
Note 1:
Not a physical register.
2:
The PCON register is not implemented on the
PIC16C71.
3:
These locations are unimplemented in Bank 1.
Any access to these locations will access the
corresponding Bank 0 register.
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