參數(shù)資料
型號(hào): PIC16C505-20/P
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP14
封裝: 0.300 INCH, PLASTIC, DIP-14
文件頁(yè)數(shù): 4/85頁(yè)
文件大小: 1205K
代理商: PIC16C505-20/P
PIC16C505
DS40192C-page 12
1999 Microchip Technology Inc.
4.2
Data Memory Organization
Data memory is composed of registers or bytes of
RAM. Therefore, data memory for a device is specified
by its register file. The register file is divided into two
functional groups: Special Function Registers and
General Purpose Registers.
The Special Function Registers include the TMR0
register, the Program Counter (PCL), the Status
Register, the I/O registers (ports) and the File Select
Register
(FSR).
In
addition,
Special
Function
Registers are used to control the I/O port configuration
and prescaler options.
The General Purpose Registers are used for data and
control information under command of the instructions.
For the PIC16C505, the register file is composed of 8
Special Function Registers, 24 General Purpose
Registers and 48 General Purpose Registers that may
be addressed using a banking scheme (Figure 4-2).
4.2.1
GENERAL PURPOSE REGISTER FILE
The General Purpose Register file is accessed, either
directly or indirectly, through the File Select Register
FIGURE 4-2:
PIC16C505 REGISTER FILE MAP
File Address
00h
01h
02h
03h
04h
05h
06h
07h
1Fh
INDF(1)
TMR0
PCL
STATUS
FSR
OSCCAL
PORTB
0Fh
10h
Bank 0
Bank 1
3Fh
30h
20h
2Fh
General
Purpose
Registers
General
Purpose
Registers
General
Purpose
Registers
Addresses map back to
addresses in Bank 0.
Note 1:
Not a physical register.
FSR<6:5>
00
01
Bank 3
7Fh
70h
60h
6Fh
General
Purpose
Registers
11
Bank 2
5Fh
50h
40h
4Fh
General
Purpose
Registers
10
08h
PORTC
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