FlashFlex MCU
SST89E516RD2 / SST89E516RD
SST89V516RD2 / SST89V516RD
Data Sheet
4.2.4.5 Byte-Verify
4.2.4.7 Prog-SC0
The Byte-Verify command allows the user to verify that the
device has correctly performed an Erase or Program com-
mand. 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 completed before
issuing a Byte-Verify. Byte-Verify command execution time
is short enough that there is no need to poll for command
completion and no interrupt is generated.
Prog-SC0 command is used to program the SC0 bit. This
command only changes the SC0 bit and has no effect on
BSEL bit until after a reset cycle.
SC0 bit previously in un-programmed state can be pro-
grammed by this command. The Prog-SC0 command
should reside only in Block 1 or external code memory.
IAP Enable
IAP Enable
ORL SFCF, #40H
ORL SFCF, #40H
Program byte address
MOV SFAH, #byte_addressH
MOV SFAL, #byte_addressL
Set-up Program SC0
MOV SFAH, #5AH
MOV SFDT, #0AAH
MOV SFCM, #0CH
Program SC0
Polling scheme
MOV SFCM, #09H
Program SC0
Interrupt scheme
MOV SFCM, #89H
SFDT register
contains data
1273 F09.0
Polling SFST[2]
INT1# Interrupt
indicates completion
indicates completion
4.2.4.6 Prog-SB3, Prog-SB2, Prog-SB1
Prog-SB3, Prog-SB2, Prog-SB1 commands are used to
program the security bits (see Table 9-1). Completion of
any of these commands, the security options will be
updated immediately.
1273 F11.0
4.2.4.8 Enable-Clock-Double
Enable-Clock-Double command is used to make the MCU
run at 6 clocks per machine cycle. The standard (default) is
12 clocks per machine cycle (i.e. clock double command
disabled).
Security bits previously in un-programmed state can be
programmed by these commands. Prog-SB3, Prog-SB2
and Prog-SB1 commands should only reside in Block 1 or
external code memory.
IAP Enable
ORL SFCF, #40H
IAP Enable
ORL SFCF, #40H
Set-up Enable-Clock-Double
MOV SFAH, #55H
Set-Up
MOV SFDT, #0AAH
MOV SFDT, #0AAH
Program SB2
Program Enable-Clock-Double
Polling scheme
Program Enable-Clock-Double
Interrupt scheme
Program SB1
MOV SFCM, #0FH
or
Program SB3
MOV SFCM, #05H
or
MOV SFCM, #03H
or
OR
OR
MOV SFCM, #08H
MOV SFCM, #88H
MOV SFCM, #8FH
MOV SFCM, #85H
MOV SFCM, #83H
Polling SFST[2]
INT1# Interrupt
indicates completion
indicates completion
Polling SFST[2]
indicates completion
INT1# Interrupt
indicates completion
1273 F12.0
1273 F10.0
©2007 Silicon Storage Technology, Inc.
S71273-03-000
1/07
37
SST [ SILICON STORAGE TECHNOLOGY, INC ]
