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HY29DS162 Datasheet(PDF) 25 Page - Hynix Semiconductor |
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HY29DS162 Datasheet(HTML) 25 Page - Hynix Semiconductor |
25 / 48 page 25 HY29DS162/HY29DS163 r1.3/Apr 01 WRITE OPERATION STATUS The HY29DS16x provides a number of facilities to determine the status of a program or erase op- eration. These are the RY/BY# (Ready/Busy#) pin and certain bits of a status word which can be read from the device during the programming and erase operations. Table 16 summarizes the sta- tus indications and further detail is provided in the subsections which follow. RY/BY# - Ready/Busy# RY/BY# is an open-drain output pin that indicates whether a programming or erase Automatic Algo- rithm is in progress or has completed. A pull-up resistor to V CC is required for proper operation. RY/ BY# is valid after the rising edge of the final WE# pulse in the corresponding command sequence, including during the sector erase time-out. If the output is Low (busy), the device is actively erasing or programming, including programming while in the Erase Suspend mode. If the output is High (ready), the device has completed the op- eration and is ready to read array data, is in the standby mode, or at least one bank is in the erase- suspend read mode. Table 16. Write and Erase Operation Status Summary Notes: 1. A valid address within the bank where an Automatic algorithm is in progress is required when reading status information except RY/BY#. For a programming operation, the address used for the read cycle should be the program address. For an erase operation, the address used for the read cycle should be any address within a non-protected sector marked for erasure (any address for the chip erase operation). 2. DQ[5] status switches to a ‘1’ when a program or erase operation exceeds the maximum timing limit. 3. A ‘1’ during sector erase indicates that the 50 µs time-out has expired and active erasure is in progress. DQ[3] is not applicable to the chip erase operation. 4. Equivalent to ‘No Toggle’ because data is obtained in this state. For ‘Erase Completed’, 5. Data (DQ[7:0]) = 0xFF immediately after erasure. 6. Programming can be done only in a non-suspended sector (a sector not specified for erasure). e d o M n o i t a r e p O ] 7 [ Q D 1 ] 6 [ Q D ] 5 [ Q D ] 3 [ Q D ] 2 [ Q D 1 # Y B / Y R l a m r o N s s e r g o r p n i g n i m m a r g o r P# ] 7 [ Q De l g g o T1 / 0 2 A / NA / N0 d e t e l p m o c g n i m m a r g o r Pa t a Da t a D 4 a t a Da t a Da t a D1 s s e r g o r p n i e s a r E0 e l g g o T1 / 0 2 1 3 e l g g o T0 d e t e l p m o c e s a r E 5 a t a Da t a D 4 a t a Da t a Da t a D 4 1 e s a r E d n e p s u S d e d n e p s u s e s a r e n i h t i w d a e R r o t c e s 1e l g g o t o N0 A / Ne l g g o T1 e s a r e - n o n n i h t i w d a e R r o t c e s d e d n e p s u s a t a Da t a Da t a Da t a Da t a D1 s s e r g o r p n i g n i m m a r g o r P 6 # ] 7 [ Q De l g g o T1 / 0 2 A / NA / N0 d e t e l p m o c g n i m m a r g o r P 6 a t a Da t a D 4 a t a Da t a Da t a D1 DQ[7] - Data# Polling The Data# Polling bit, DQ[7], indicates to the host system whether an Automatic Algorithm is in progress or completed, or whether a bank is in Erase Suspend mode. Data# Polling is valid after the rising edge of the final WE# pulse in the pro- gram or erase command sequence. While a programming operation is in progress, the device outputs the complement of the value pro- grammed to DQ[7]. When the programming op- eration is complete, the device outputs the value programmed to DQ[7]. If a program operation is attempted within a protected sector, Data# Poll- ing on DQ[7] is active for approximately 1 µs, then the device returns to reading array data. The host system must do a read at the program address to obtain valid programming status information on this bit. During an erase operation, Data# Polling produces a “0” on DQ[7]. When the erase operation is com- plete, or if the bank enters the Erase Suspend mode, Data# Polling produces a “1” on DQ[7]. The host must read at an address within any of the non-protected sectors designated for erasure to |
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