PIC16F83 Datasheet

IC型号：
PIC16F83
PDF描述：
18-pin Flash/EEPROM 8-Bit Microcontrollers
文件大小：
1384.88KB
PDF页数：
125页
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PIC16F8X

4.0

MEMORY ORGANIZATION

FIGURE 4-1:

There are two memory blocks in the PIC16F8X. These

are the program memory and the data memory. Each

block has its own bus, so that access to each block can

occur during the same oscillator cycle.

The data memory can further be broken down into the

general purpose RAM and the Special Function

Registers (SFRs). The operation of the SFRs that

control the 鈥渃ore鈥?are described here. The SFRs used

to control the peripheral modules are described in the

section discussing each individual peripheral module.

The data memory area also contains the data

EEPROM memory. This memory is not directly mapped

into the data memory, but is indirectly mapped. That is,

an indirect address pointer speci铿乪s the address of the

data EEPROM memory to read/write. The 64 bytes of

data EEPROM memory have the address range

0h-3Fh. More details on the EEPROM memory can be

found in Section 7.0.

PROGRAM MEMORY MAP

AND STACK -

PIC16F83/CR83

PC<12:0>

CALL, RETURN

RETFIE, RETLW

Stack Level 1

鈥?/div>

Stack Level 8

Reset Vector

User Memory

Space

Peripheral Interrupt Vector

0000h

0004h

1FFh

4.1

Program Memory Organization

1FFFh

The PIC16FXX has a 13-bit program counter capable

of addressing an 8K x 14 program memory space. For

the PIC16F83 and PIC16CR83, the 铿乺st 512 x 14

(0000h-01FFh)

are

physically

implemented

(Figure 4-1). For the PIC16F84 and PIC16CR84, the

铿乺st 1K x 14 (0000h-03FFh) are physically imple-

mented (Figure 4-2). Accessing a location above the

physically implemented address will cause a wrap-

around. For example, for the PIC16F84 locations 20h,

420h, 820h, C20h, 1020h, 1420h, 1820h, and 1C20h

will be the same instruction.

The reset vector is at 0000h and the interrupt vector is

at 0004h.

FIGURE 4-2:

PROGRAM MEMORY MAP

AND STACK -

PIC16F84/CR84

PC<12:0>

CALL, RETURN

RETFIE, RETLW

Stack Level 1

鈥?/div>

Stack Level 8

Reset Vector

Peripheral Interrupt Vector

0000h

0004h

User Memory

Space

3FFh

1FFFh

漏

1998 Microchip Technology Inc.

DS30430C-page 11

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