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SST89E58RD2-40-C-NI Datasheet(PDF) 35 Page - Silicon Storage Technology, Inc |
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SST89E58RD2-40-C-NI Datasheet(HTML) 35 Page - Silicon Storage Technology, Inc |
35 / 91 page Preliminary Specifications FlashFlex51 MCU SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2 SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2 35 ©2004 Silicon Storage Technology, Inc. S71255-00-000 3/04 4.0 FLASH MEMORY PROGRAMMING The device internal flash memory can be programmed or erased using the following two methods: • External Host Programming mode • In-Application Programming (IAP) mode 4.1 External Host Programming Mode External host programming mode allows the user to pro- gram the flash memory directly without using the CPU. External host mode is entered by forcing PSEN# from a logic high to a logic low while RST input is being held con- tinuously high. The device will stay in external host mode as long as RST = 1 and PSEN# = 0. A Read-ID operation is necessary to “arm” the device in external host mode, and no other external host mode com- mands can be enabled until a Read-ID is performed. In external host mode, the internal flash memory blocks are accessed through the re-assigned I/O port pins (see Figure 4-1 for details) by an external host, such as a MCU program- mer, a PCB tester or a PC-controlled development board. Note: VIL = Input Low Voltage; VIH = Input High Voltage; VIH1 = Input High Voltage (XTAL, RST); X = Don’t care; AL = Address low order byte; AH = Address high order byte; DI = Data Input; DO = Data Output; A[15:13] = 0xxb for Block 0 and A[15:13] = 111b for Block 1 TABLE 4-1: EXTERNAL HOST MODE COMMANDS FOR SST89E/V5XRD2 Operation RST PSEN# PROG#/ ALE EA# P3[7] P3[6] P2[7] P2[6] P0[7:0] P3[5:4] P2[5:0] P1[7:0] Read-ID VIH1 VIL VIH VIH VIL VIL VIL VIL DO AH AL Chip-Erase VIH1 VIL ⇓1 1. Symbol ⇓ signifies a negative pulse and the command is asserted during the low state of PROG#/ALE input. All other combinations of the above input pins are invalid and may result in unexpected behaviors. VIH VIL VIL VIL VIH XXX Block-Erase VIH1 VIL ⇓ VIH VIH VIH VIL VIH X A[15:13] X Sector-Erase VIH1 VIL ⇓ VIH VIH VIL VIH VIH XAH AL Byte-Program VIH1 VIL ⇓ VIH VIH VIH VIH VIL DI AH AL Byte-Verify (Read) VIH1 VIL VIH VIH VIH VIH VIL VIL DO AH AL Prog-SC0 VIH1 VIL ⇓ VIH VIH VIL VIL VIH X5AH X Prog-SC1 VIH1 VIL ⇓ VIH VIH VIL VIL VIH X AAH X Prog-SB1 VIH1 VIL ⇓ VIH VIH VIH VIH VIH XXX Prog-SB2 VIH1 VIL ⇓ VIH VIL VIL VIH VIH XXX Prog-SB3 VIH1 VIL ⇓ VIH VIL VIH VIL VIH XXX Enable-Clock-Double VIH1 VIL ⇓ VIH VIH VIL VIL VIL X 55H X T4-1.0 1255 |
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