Datasheet 搜索 > 微控制器 > Microchip（微芯） > PIC16C74B-20I/P 数据手册 > PIC16C74B-20I/P 用户编程技术手册 4/26 页
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PIC16C74B-20I/P 用户编程技术手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
DIP-40
描述:
MICROCHIP PIC16C74B-20I/P 微控制器, 8位, 一次性可编程, PIC16C7xx, 20 MHz, 7 KB, 192 Byte, 40 引脚, DIP
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PIC16C74B-20I/P数据手册
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PIC16C6XX/7XX/9XX
DS30228K-page 4 2001 Microchip Technology Inc.
2.0 PROGRAM MODE ENTRY
2.1 User Program Memory Map
The user memory space extends from 0x0000 to
0x1FFF (8K). Table 2-1 shows actual implementation
of program memory in the PIC16C6XX/7XX/9XX
family.
TABLE 2-1: IMPLEMENTATION OF
PROGRAM MEMORY IN THE
PIC16C6XX/7XX/9XX
When the PC reaches the last location of the imple-
mented program memory, it will wrap around and
address a location within the physically implemented
memory (see Figure 2-1).
Once in configuration memory, the highest bit of the PC
stays a ’1’, thus, always pointing to the configuration
memory. The only way to point to user program mem-
ory is to reset the part and re-enter Program/Verify
mode, as described in Section 2.2.
A user may store identification information (ID) in four
ID locations. The ID locations are mapped in [0x2000:
0x2003]. It is recommended that the user use only the
four Least Significant bits of each ID location. In some
devices, the ID locations read-out in a scrambled
fashion after code protection is enabled. For these
devices, it is recommended that ID location is written
as “11 1111 1bbb bbbb”, where 'bbbb' is ID
information.
In other devices, the ID locations read out normally,
even after code protection. To understand how the
devices behave, refer to Table 4-1.
To understand the scrambling mechanism after code
protection, refer to Section 3.1.
Device
Program Memory
Size
PIC16C61 0x000 – 0x3FF (1K)
PIC16C620/620A 0x000 – 0x1FF (0.5K)
PIC16C621/621A 0x000 – 0x3FF (1K)
PIC16C622/622A 0x000 – 0x7FF (2K)
PIC16C62/62A/62B 0x000 – 0x7FF (2K)
PIC16C63/63A 0x000 – 0xFFF (4K)
PIC16C64/64A 0x000 – 0x7FF (2K)
PIC16C65/65A/65B 0x000 – 0xFFF (4K)
PIC16CE623 0x000 – 0x1FF (0.5K)
PIC16CE624 0x000 – 0x3FF (1K)
PIC16CE625 0x000 – 0x7FF (2K)
PIC16C71 0x000 – 0x3FF (1K)
PIC16C710 0x000 – 0x1FF (0.5K)
PIC16C711 0x000 – 0x3FF (1K)
PIC16C712 0x000 – 0x3FF (1K)
PIC16C716 0x000 – 0x7FF (2K)
PIC16C72/72A 0x000 – 0x7FF (2K)
PIC16C73/73A/73B 0x000 – 0xFFF (4K)
PIC16C74/74A/74B 0x000 – 0xFFF (4K)
PIC16C66 0x000 – 0x1FFF (8K)
PIC16C67 0x000 – 0x1FFF (8K)
PIC16C76 0x000 – 0x1FFF (8K)
PIC16C77 0x000 – 0x1FFF (8K)
PIC16C745 0x000 – 0x1FFF (8K)
PIC16C765 0x000 – 0x1FFF (8K)
PIC16C773 0x000 – 0xFFF (4K)
PIC16C774 0x000 – 0xFFF (4K)
PIC16C923/924/925 0x000 – 0xFFF (4K)
PIC16C926 0x000 – 0x1FFF (8K)
Note: All other locations are reserved and should
not be programmed.
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