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HY29F040AP-90 Datasheet(PDF) 7 Page - Hynix Semiconductor |
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HY29F040AP-90 Datasheet(HTML) 7 Page - Hynix Semiconductor |
7 / 40 page 7 HY29F040A COMMAND DEFINITIONS Device operations are selected by writing specific address and data sequences into the Command register. Writing incorrect addresses and data values or writing them in the improper Table 4. Command Definitions(1,2,3,4) Bus First Bus Second Bus Third Bus Fourth Bus Fifth Bus Sixth Bus Command Write Write Cycle Write Cycle Write Cycle Write Cycle Write Cycle Write Cycle Sequence Cycles Req'd Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data Read/Reset 1 XXXH F0H RA RD Read/Reset 4 5555H AAH 2AAAH 55H 5555H F0H RA RD Electronic ID 4 5555H AAH 2AAAH 55H 5555H 90H XX00H ADH XX01H A4H Byte Program 4 5555H AAH 2AAAH 55H 5555H A0H PA PD Chip Erase 6 5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H 5555H 10H Sector Erase 6 5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H SA 30H Erase Suspend 1 XXXH B0H Erase Resume 1 XXXH 30H Notes: 1. Bus Operations are defined in Table 1. 2. For a Command Sequence, address bits A15, A14, A13, A12, and A11 = X = Don’t care. Address bits A18, A17, A16, and A15 = X = Don’t care for all address commands except for Program Address(PA) and Sector Address(SA). In the case of Sector Address, address bit A15 = X = Don’t care for all addresses except for Program Address (PA) and Sector Addresses (SA). 3. RA = Address of the memory location to be read. RD = Data read from location RA during read operation. PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of the /WE pulse. PD = Data to be programmed at location PA. Data is latched on the falling edge of /WE. SA = Address of the sector to be erased (see Table 3). 4. The Erase Suspend (B0H) and Erase Resume (30H) commands are valid only while the Sector Erase opera tion is in progress. sequence will reset the device to Read mode. Table 4 defines the valid register command sequences. Either Read/Reset command will reset the device (when applicable). |
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