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PIC12C508A-04/P 参数 Datasheet PDF下载

PIC12C508A-04/P图片预览
型号: PIC12C508A-04/P
PDF下载: 下载PDF文件 查看货源
内容描述: 8引脚, 8位CMOS微控制器 [8-Pin, 8-Bit CMOS Microcontrollers]
分类和应用: 微控制器和处理器外围集成电路光电二极管PC可编程只读存储器时钟
文件页数/大小: 113 页 / 1604 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC12C5XX  
FIGURE 4-1: PROGRAM MEMORY MAP  
AND STACK  
4.0  
MEMORY ORGANIZATION  
PIC12C5XX memory is organized into program mem-  
ory and data memory. For devices with more than 512  
bytes of program memory, a paging scheme is used.  
Program memory pages are accessed using one STA-  
TUS register bit. For the PIC12C509, PIC12C509A,  
PICCR509A and PIC12CE519 with a data memory  
register file of more than 32 registers, a banking  
scheme is used. Data memory banks are accessed  
using the File Select Register (FSR).  
PC<11:0>  
12  
CALL, RETLW  
Stack Level 1  
Stack Level 2  
Reset Vector (note 1)  
0000h  
4.1  
Program Memory Organization  
On-chip Program  
Memory  
The PIC12C5XX devices have  
a
12-bit Program  
Counter (PC) capable of addressing  
program memory space.  
a
2K 12  
x
512 Word  
01FFh  
0200h  
Only the first 512  
x 12 (0000h-01FFh) for the  
PIC12C508, PIC12C508A and PIC12CE518 and 1K x  
12 (0000h-03FFh) for the PIC12C509, PIC12C509A,  
PIC12CR509A, and PIC12CE519 are physically  
On-chip Program  
Memory  
implemented. Refer to Figure 4-1. Accessing  
a
location above these boundaries will cause a wrap-  
around within the first 512 x 12 space (PIC12C508,  
PIC12C508A and PIC12CE518) or 1K x 12 space  
(PIC12C509, PIC12C509A, PIC12CR509A and  
PIC12CE519). The effective reset vector is at 000h,  
(see Figure 4-1). Location 01FFh (PIC12C508,  
PIC12C508A and PIC12CE518) or location 03FFh  
(PIC12C509, PIC12C509A, PIC12CR509A and  
PIC12CE519) contains the internal clock oscillator  
calibration value. This value should never be  
overwritten.  
1024 Word  
03FFh  
0400h  
7FFh  
Note 1: Address 0000h becomes the  
effective reset vector. Location  
01FFh (PIC12C508, PIC12C508A,  
PIC12CE518) or location 03FFh  
(PIC12C509, PIC12C509A,  
PIC12CR509A, PIC12CE519) con-  
tains the MOVLW XXINTERNAL RC  
oscillator calibration value.  
1999 Microchip Technology Inc.  
DS40139E-page 13  
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