Microchip Technology PIC12F1501, Manual

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PIC16(L)F1508/9
DS40001609E-page 18
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2011-2015 Microchip Technology Inc.
3.3 Data Memory Organization
The data memory is partitioned in 32 memory banks
with 128 bytes in a bank. Each bank consists of
(
Figure 3-2 ):
• 12 core registers
• 20 Special Function Registers (SFR)
• Up to 80 bytes of General Purpose RAM (GPR)
• 16 bytes of common RAM
The active bank is selected by writing the bank number
into the Bank Select Register (BSR). Unimplemented
memory will read as ‘
0
’. All data memory can be
accessed either directly (via instructions that use the
file registers) or indirectly via the two File Select
Registers (FSR). See
Section 3.6 “Indirect
Addressing”
for more information.
Data memory uses a 12-bit address. The upper five bits
of the address define the Bank address and the lower
seven bits select the registers/RAM in that bank.
3.3.1 CORE REGISTERS
The core registers contain the registers that directly
affect the basic operation. The core registers occupy
the first 12 addresses of every data memory bank
(addresses x00h/x08h through x0Bh/x8Bh). These
registers are listed below in
Table 3-2 . For detailed
information, see Table 3-8 .
TABLE 3-2: CORE REGISTERS
Addresses BANKx
x00h or x80h INDF0
x01h or x81h INDF1
x02h or x82h PCL
x03h or x83h STATUS
x04h or x84h FSR0L
x05h or x85h FSR0H
x06h or x86h FSR1L
x07h or x87h FSR1H
x08h or x88h BSR
x09h or x89h WREG
x0Ah or x8Ah PCLATH
x0Bh or x8Bh INTCON