Rainbow Electronics AT89C5131 - Manual (Page 172)

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AT89C5131
4136A–USB–03/03
Table of Contents
Features ................................................................................................. 1
Description ............................................................................................ 2
Block Diagram ....................................................................................... 3
Pinout Description ................................................................................ 4
Pinout.................................................................................................................... 4
Signals ................................................................................................................... 7
SFR Mapping ....................................................................................... 12
Clock Controller .................................................................................. 19
Introduction ......................................................................................................... 19
Oscillator............................................................................................................. 19
PLL ..................................................................................................................... 20
Registers.............................................................................................................. 22
Dual Data Pointer Register ................................................................ 24
Program/Code Memory ...................................................................... 26
External Code Memory Access .......................................................................... 26
Flash Memory Architecture................................................................................. 27
Overview of FM0 Operations .............................................................................. 28
Registers............................................................................................................. 34
Flash EEPROM Memory ..................................................................... 35
General Description ............................................................................................ 35
Features.............................................................................................................. 35
Flash Programming and Erasure........................................................................ 35
Flash Registers and Memory Map....................................................................... 36
Flash Memory Status.......................................................................................... 39
Memory Organization ......................................................................................... 39
Boot Process ...................................................................................................... 40
In-System Programming (ISP)............................................................................. 42
In-application Programming Method................................................................... 45
EEPROM Data Memory ....................................................................... 51
Description.......................................................................................................... 51
Write Data in the Column Latches ...................................................................... 51
Programming ...................................................................................................... 51
Read Data........................................................................................................... 51
Registers.............................................................................................................. 52