SST89E554 データシートの表示（PDF） - Silicon Storage Technology
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SST89E554 Datasheet PDF : 58 Pages
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FlashFlex51 MCU
SST89E564 / SST89V564 / SST89E554 / SST89V554
Preliminary Specifications
RST
TSU
TES
PSEN#
ALE/PROG#
EA#
P3[3]
P3[5:4], P2[5:0]
P1
TADS
TPROG
TDH
TPS
AH
AL
P0
P3[7:6], P2[7:6]
DI
1110b
384 ILL F06.2
FIGURE 4-8: BYTE-PROGRAM
Programs the addressed code byte if the byte location has been successfully erased and not yet programmed.
Byte-Program operation is only allowed when the security lock is not activated on that flash memory block.
RST
PSEN#
ALE/PROG#
EA#
P3[3]
P3[7:6], P2[7:6]
TSU
TES
TADS
TPROG
TDH
TPS
1111b / 0011b / 0101b
384 ILL F49.2
FIGURE 4-9: PROG-SB1 / PROG-SB2 / PROG-SB3
Programs the Security bits SB1, SB2 and SB3 respectively. Only a Chip-Erase will erase a programmed security bit.
©2001 Silicon Storage Technology, Inc.
31
S71181-03-000 9/01 384
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