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数据搜索系统，热门电子元器件搜索 |
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HC705P6AGRS/D 数据表(PDF) 86 Page - NXP Semiconductors |
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HC705P6AGRS/D 数据表(HTML) 86 Page - NXP Semiconductors |
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86 / 134 page  EPROM General Release Specification MC68HC705P6A — Rev. 1.0 EPROM To program a byte of EPROM, manipulate the EPROG register as follows: 1. Set the ELAT bit in the EPROG register. 2. Write the desired data to the desired EPROM address. 3. Set the EPGM bit in the EPROG register for the specified programming time, t EPGM . 4. Clear the ELAT and EPGM bits in the EPROG register. This sequence is also shown in the sample program listing in Table 10-1. Table 10-1. EPROM Programming Routine 001C 0055 0700 0000 EPROG DATA EPROM EPGM EQU $1C EQU $55 EQU $700 EQU $00 PROGRAMMING REG DATA VALUE A SAMPLE EPROM ADX EPGM BIT IN EPROG REG 00D0 ORG $D0 00D0 00D2 00D4 00D6 00D9 00DB 00DD 00DF A6 02 B7 1C A6 55 C7 07 00 10 1C AD 03 3F 1C 81 LDA #$04 STA EPROG LDA #DATA STA EPROM BSET EPGM, EPROG BSR DELAY CLR EPROG RTS SET LAT BIT IN EPROG DATA BYTE WRITE IT TO EPROM LOC TURN ON PGM VOLTAGE WAIT 4 ms MINIMUM CLR LAT AND PGM BITS Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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