SST89C54-33-I-PI View Datasheet(PDF) - Silicon Storage Technology
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SST89C54-33-I-PI Datasheet PDF : 50 Pages
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IAP Enable
Program byte address
MOV SFAH, #byte_addressh
MOV SFAL, #byte_addressl
Move data to SFDT
MOV SFDT, #data
Next same
row address
Polling scheme
MOV SFCM, #06h
SFST[3] indicates
byte completion
Interrupt scheme
MOV SFCM, #86h
INT1# occurrence
indicates completion
Y
Program
another
byte
N
SFST[2] indicates
Burst-Program completion
344 ILL F43.5
The BYTE-VERIFY command allows the user to verify
that the SST89C54/58 has correctly performed an Erase
or Program command. The BYTE-VERIFY command
sequence is as follows:
IAP Enable
FlashFlex51 MCU
SST89C54 / SST89C58
Preliminary Specifications
PROG-SB3, PROG-SB2, PROG-SB1 commands are
used to program the Security bits (see Table 8). These
commands work similarly to a BYTE-PROGRAM com-
mand, except no address and data is specified. Upon
completion of any of those commands, the security
options will be updated immediately.
Security bits previously in un-programmed state can be
programmed by these commands. The PROG-SB3,
PROG-SB2, PROG-SB1 sequences are as follows:
IAP Enable
Set-Up
MOV SFDT, #55h
Program sb1
Program sb2
Program sb3
MOV SFCM, #0Fh
MOV SFCM, #03h
MOV SFCM, #05h
or
OR
or
OR
or
MOV SFCM, #8Fh
MOV SFCM, #83h
MOV SFCM, #85h
Polling SFST[2]
indicates completion
Interrupt INT1#
occurrence completion
344 ILL F45.3
PROG-RB1, PROG-RB0 commands are used to pro-
gram the Re-Map[1:0] bits (see Table 2). These com-
mands work similarly to a BYTE-PROGRAM command
except no address and data is needed. These com-
mands only change the Re-Map[1:0] bits and have no
effect on MAP_EN[1:0] until after a reset cycle. There-
fore, the effect of these commands is not immediate.
Program byte address
MOV SFAH, #byte_addressh
MOV SFAL, #byte_addressl
MOV SFCM, #0Ch
SFDT register
contains data
344 ILL F44.2
BYTE-VERIFY command returns the data byte in SFDT
if the command is successful. The user is required to
check that the previous Flash operation has fully com-
pleted before issuing a BYTE-VERIFY.
© 2000 Silicon Storage Technology, Inc.
28
344-2 8/00
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