PIC12CE674 datasheet(11/130 Pages) MICROCHIP

Part #	PIC12CE674

Description	8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEPROM Data Memory

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 1997-2013 Microchip Technology Inc.

DS30561C-page 11

PIC12C67X

4.0

MEMORY ORGANIZATION

4.1

Program Memory Organization

The PIC12C67X has a 13-bit program counter capable

of addressing an 8K x 14 program memory space.

For the PIC12C671 and the PIC12CE673, the first 1K x

14 (0000h-03FFh) is implemented.

For the PIC12C672 and the PIC12CE674, the first 2K

x 14 (0000h-07FFh) is implemented. Accessing a loca-

tion above the physically implemented address will

cause a wraparound. The reset vector is at 0000h and

the interrupt vector is at 0004h.

FIGURE 4-1:

PIC12C67X PROGRAM

MEMORY MAP AND STACK

PC<12:0>

13

0000h

0004h

0005h

07FFh

1FFFh

Stack Level 1

Stack Level 8

Reset Vector

Interrupt Vector

On-Chip Program

Memory

CALL, RETURN

RETFIE, RETLW

0800h

0400h

03FFh

Peripheral

(PIC12C672 and

PIC12CE674 only)

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.

Also note that F0h through FFh on the PIC12C67X is

mapped into Bank 0 registers 70h-7Fh as common

RAM.

4.2.1

GENERAL PURPOSE REGISTER FILE

The register file can be accessed either directly or indi-

rectly

through

the

File

Select

Register

FSR

(Section 4.5).

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