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SM5964 Datasheet(PDF) 11 Page - SyncMOS Technologies,Inc |
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SM5964 Datasheet(HTML) 11 Page - SyncMOS Technologies,Inc |
11 / 26 page SyncMOS Technologies International, Inc. SM5964 8-Bits Micro-controller 64KB ISP flash & 1KB RAM embedded Specifications subject to change without notice contact your sales representatives for the most recent information. Ver 2.2 SM5964 08/2006 11 ISP Flash Data Register (ISPFD, $F6) bit-7 bit-0 FD7 FD6 FD5 FD4 FD3 FD2 FD1 FD0 Read / Write: R/W R/W R/W R/W R/W R/W R/W R/W Reset value: 0 0 0 0 0 0 0 0 FD7 ~FD0 : flash data for ISP function The ISPFD provide the 8-bit data for ISP function ISP Flash Control Register (ISPC, $F7) bit-7 bit-0 START Unused Unused Unused Unused Unused ISPF1 ISPF0 Read / Write: R/W - - - - - R/W R/W Reset value: 0 * * * * * 0 0 F[1: 0]: ISP function select bit START: ISP function start bit = 1: start ISP function which indicated by bit 1, bit 0 (F1, F0) = 0: no operation The START bit is read-only by default, software must write three specific values 55H, AAH and 55H sequentially to the ISPFD register to enable the START bit write attribute. That is: MOV ISPFD, #55H MOV ISPFD, #0AAH MOV ISPFD, #55H Any attempt to set START bit will not be allowed without the procedure above. After START bit set to 1 then the SM5964 hardware circuit will latch address and data bus and hold the program counter until the START bit reset to 0 when ISP function finished. User does not need to check START bit status by software method. F[1:0] ISP function 00 Byte program 01 Chip protect 10 Page erase 11 Chip erase F[1:0]: ISP function select bit One page of flash memory is 512 byte. |
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