HY29DL162 Datasheet, PDF (15/48 Pages) Hynix Semiconductor – 16 Megabit (2M x 8/1M x16) Low Voltage, Dual Bank, Simultaneous Read/Write Flash Memory

START
RESET# = V_ID
(All protected sectors
become unprotected)
Perform Program or Erase
Operations
RESET# = V_IH
(All previously protected
sectors return to protected
state)
HY29DL162/HY29DL163
n A read cycle containing a sector address (SA)
within the designated bank in A[19:12] and the
address 0x04 in A[6:0, A-1] in byte mode, or
0x02 in A[7:0] in word mode, returns 0x01 if
that sector is protected, or 0x00 if it is unpro-
tected.
n A read cycle at address 0xXXX03 in word mode
or 0xXXX06 in byte mode returns 0x80 if the
Sec² region is protected and locked at the fac-
tory and 0x00 if it is not.
TEMPORARY SECTOR
UNPROTECT COMPLETE
Figure 3. Temporary Sector Unprotect
Algorithm
DEVICE COMMANDS
Device operations are initiated by writing desig-
nated address and data command sequences into
the device. Addresses are latched on the falling
edge of WE# or CE#, whichever happens later.
Data is latched on the rising edge of WE# or CE#,
whichever happens first.
A command sequence is composed of one, two
or three of the following sub-segments: an unlock
cycle, a command cycle and a data cycle. Table
9 summarizes the composition of the valid com-
mand sequences implemented in the HY29DL16x,
and these sequences are fully described in Table
10 and in the sections that follow.
Writing incorrect address and data values or writ-
ing them in the improper sequence resets the
HY29DL16x to the Read mode.
Reading Data
The device automatically enters the Read mode
after device power-up, after the RESET# input is
asserted and upon the completion of certain com-
mands. Commands are not required to retrieve
data in this mode. See Read Operation section
for additional information.
Reset Command
Writing the Reset command resets the sectors to
the Read or Erase-Suspend mode. Address bits
are don’t cares for this command.
r1.3/June 01
Table 9. Composition of Command Sequences
Command
Sequence
Number of Bus Cycles
Unlock Command Data
Read
0
0
Note 1
Reset
0
1
0
Enter Sec² Region 2
1
0
Exit Sec² Region
2
1
1
Byte/Word Program 2
1
1
Unlock Bypass
2
1
0
Unlock Bypass
Reset
0
1
1
Unlock Bypass
Byte/Word Program
0
1
1
Chip Erase
4
1
1
Sector Erase
4
1
1 (Note 2)
Erase Suspend
0
1
0
Erase Resume
0
1
0
Electronic ID
2
1
Note 3
CFI Query
0
1
Note 4
Notes:
1. Any number of Flash array read cycles are permitted.
2. Additional data cycles may follow. See text.
3. Any number of Electronic ID read cycles are permitted.
4. Any number of CFI data read cycles are permitted.
15