參數(shù)資料
型號(hào): SST89V516RD-33-I-PIE
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PDIP40
封裝: LEAD FREE, PLASTIC, MS-011AC, DIP-40
文件頁(yè)數(shù): 29/80頁(yè)
文件大?。?/td> 934K
代理商: SST89V516RD-33-I-PIE
Data Sheet
FlashFlex51 MCU
SST89E516RD2 / SST89E516RD
SST89V516RD2 / SST89V516RD
35
2005 Silicon Storage Technology, Inc.
S71273-01-000
3/05
4.2.4 In-Application Programming Mode
Commands
All of the following commands can only be initiated in the
IAP mode. In all situations, writing the control byte to the
SFCM register will initiate all of the operations. All com-
mands will not be enabled if the security locks are enabled
on the selected memory block.
The Program command is for programming new data into
the memory array. The portion of the memory array to be
programmed should be in the erased state, FFH. If the
memory is not erased, it should first be erased with an
appropriate Erase command. Warning: Do not attempt to
write (program or erase) to a block that the code is cur-
rently fetching from. This will cause unpredictable pro-
gram behavior and may corrupt program data.
4.2.4.1 Chip-Erase
The Chip-Erase command erases all bytes in both memory
blocks. This command is only allowed when EA#=0 (exter-
nal memory execution). Additionally this command is not
permitted when the device is in level 4 locking. In all other
instances, this command ignores the Security Lock status
and will erase the security lock bits and re-map bits.
TABLE
4-2: IAP ADDRESS RESOLUTION
EA#
SFCF[1:0]
Address of IAP Inst.
Target Address
Block Being Programmed
1
00
>= 2000H (Block 0)
None1
1
00
>= 2000H (Block 0)
< 2000H (Block 1)
Block 1
1
00
< 2000H (Block 1)
Any (Block 0)
Block 0
1
01, 10, 11
Any (Block 0)
>= 2000H (Block 0)
None1
1
01, 10, 11
Any (Block 0)
< 2000H (Block 1)
Block 1
0
00
From external
>= 2000H (Block 0)
Block 0
0
00
From external
< 2000H (Block 1)
Block 1
0
01, 10, 11
From external
Any (Block 0)
Block 0
T4-2.0 1273
1. No operation is performed because code from one block may not program the same originating block
Set-Up
MOV SFDT, #55H
Interrupt scheme
MOV SFCM, #81H
Polling scheme
MOV SFCM, #01H
INT1 interrupt
indicates completion
SFST[2] indicates
operation completion
IAP Enable
ORL SFCF, #40H
1273 F05.0
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