HY29LV160 Hynix Semiconductor, HY29LV160 Datasheet - Page 11

• Manufacturer Part Number: HY29LV160
• Description: 16 Mbit (2M x 8/1M x 16) Low Voltage Flash Memory
• Manufacturer: Hynix Semiconductor

Electronic ID Operation (High Voltage Method)
The Electronic ID mode provides manufacturer and
device identification and sector protection verifi-
cation through codes output on DQ[15:0]. This
mode is intended primarily for programming equip-
ment to automatically match a device to be pro-
Rev. 1.2/May 01
Figure 3. Temporary Sector Unprotect
(Note: All sectors must be
A[6] = 1, A]1] = 1, A]0] = 0
unprotecting any sector)
Write 0x60 to Address
Write 0x60 to device
protected prior to
R E S E T # = V
TRYCNT = 1
Set Address:
Wait 15 ms
S N U M = 0
Wait 1 us
S T A R T
UNPROTECT COMPLETE
Perform Program or Erase
sectors return to protected
TEMPORARY SECTOR
ID
(All previously protected
(All protected sectors
become unprotected)
Algorithm
R E S E T # = V
R E S E T # = V
Operations
S T A R T
state)
ID
IH
Figure 2. Sector Unprotect Algorithm
A[6] = 1, A]1] = 1, A]0] = 0
A[19:12] = Sector SNUM
Write 0x40 to Address
S N U M = S N U M + 1
Read from Address
Data = 0x00?
Set Address:
S N U M = 3 4 ?
Y E S
N O
N O
Y E S
grammed with its corresponding programming al-
gorithm.
Two methods are provided for accessing the Elec-
tronic ID data. The first requires V
pin A[9], with additional requirements for obtain-
ing specific data items listed in Table 4. The Elec-
tronic ID data can also be obtained by the host
through specific commands issued via the com-
mand register, as described in the ‘Device Com-
mands’ section of this data sheet.
While in the high-voltage Electronic ID mode, the
system may read at specific addresses to obtain
certain device identification and status informa-
tion:
Ÿ
Ÿ
Ÿ
A read cycle at address 0xXXX00 retrieves the
manufacturer code.
A read cycle at address 0xXXX01 in Word
mode or 0xXXX02 in Byte mode returns the
device code.
A read cycle containing a sector address (SA)
in A[19:12] and the address 0x02 in Word mode
or 0x04 in Byte mode, returns 0x01 if that sec-
tor is protected, or 0x00 if it is unprotected.
Increment TRYCNT
T R Y C N T = 1 0 0 0 ?
N O
Y E S
SECTOR UNPROTECT
W r i t e R e s e t C o m m a n d
DEVICE FAILURE
R E S E T # = V
C O M P L E T E
HY29LV160
ID
on address
IH
11