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PIC16F877A-E/ML 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:
QFN-44
描述:
8位微控制器 -MCU 14KB 368 RAM 33 I/O
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PIC16F877A-E/ML数据手册
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2010 Microchip Technology Inc. Advance Information DS39589C-page 3
PIC16F87XA
2.0 PROGRAM MODE ENTRY
2.1 User Program Memory Map
The user memory space extends from 0000h to 1FFFh
(8 K words). In Programming mode, the program mem-
ory space extends from 0000h to 3FFFh, with the first
half (0000h - 1FFFh) being user program memory and
the second half (2000h - 3FFFh) being configuration
memory. The PC will increment from 0000h to 1FFFh
and wrap around to 0000h. From 2000h, the PC will
increment up to 3FFFh and wrap around to 2000h (not
to 0000h). Once in configuration memory, the highest
bit of the PC stays a ‘1’, thus always pointing to the con-
figuration memory. The only way to point to user pro-
gram memory is to reset the part and re-enter
Program/Verify mode, as described in Section 2.4.
In the configuration memory space, 2000h - 200Fh are
physically implemented. However, only locations
2000h through 2007h are available. Other locations are
reserved. Locations beyond 200Fh will physically
access user memory (see Figure 2-1).
2.2 Data EEPROM Memory
The EEPROM data memory space is a separate block
of high endurance memory that the user accesses,
using a special sequence of instructions. The amount
of data EEPROM memory depends on the device and
is shown below in number of bytes.
The contents of data EEPROM memory have the capa-
bility to be embedded into the HEX file.
The programmer should be able to read data EEPROM
information from a HEX file and conversely (as an
option), write data EEPROM contents to a HEX file,
along with program memory information and
configuration bit information.
The 256 data memory locations are logically mapped
starting at address 2100h. The format for data memory
storage is one data byte per address location, LSB
aligned.
Device # of Bytes
PIC16F873A 128
PIC16F874A 128
PIC16F876A 256
PIC16F877A 256
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