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SST89V52RD2-33-I-TQIE1 Datasheet(PDF) 36 Page - Silicon Storage Technology, Inc |
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SST89V52RD2-33-I-TQIE1 Datasheet(HTML) 36 Page - Silicon Storage Technology, Inc |
36 / 81 page 36 Data Sheet FlashFlex51 MCU SST89E52RD2/RD / SST89E54RD2/RD / SST89E58RD2/RD SST89V52RD2/RD / SST89V54RD2/RD / SST89V58RD2/RD ©2006 Silicon Storage Technology, Inc. S71255-05-000 5/06 4.2.4.4 Byte-Program The Byte-Program command programs data into a single byte. The address is determined by the contents of SFAH and SFAL. The data byte is in SFDT. FIGURE 4-4: Byte-Program 4.2.4.5 Byte-Verify 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. FIGURE 4-5: Byte-Verify 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. 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. FIGURE 4-6: Prog-SB3, Prog-SB2, Prog-SB1 Move data to SFDT MOV SFDT, #data Interrupt scheme MOV SFCM, #8EH Polling scheme MOV SFCM, #0EH INT1 interrupt indicates completion SFST[2] indicates operation completion Program byte address MOV SFAH, #byte_addressH MOV SFAL, #byte_addressL 1255 F11.0 IAP Enable ORL SFCF, #40H MOV SFCM, #0CH SFDT register contains data Program byte address MOV SFAH, #byte_addressH MOV SFAL, #byte_addressL 1255 F12.0 IAP Enable ORL SFCF, #40H Set-Up MOV SFDT, #0AAH OR OR INT1# Interrupt indicates completion Polling SFST[2] indicates completion Program SB2 MOV SFCM, #03H or MOV SFCM, #83H Program SB1 MOV SFCM, #0FH or MOV SFCM, #8FH Program SB3 MOV SFCM, #05H or MOV SFCM, #85H 1255 F13.0 IAP Enable ORL SFCF, #40H |
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