Rainbow Electronics W29EE512 - Manual (Page 8)

W29EE512
- 8 -
Command Codes for Product Identification
BYTE
SEQUENCE
ALTERNATE SOFTWARE (5)
PRODUCT IDENTIFICATION
ENTRY
SOFTWARE PRODUCT
IDENTIFICATION ENTRY
SOFTWARE PRODUCT
IDENTIFICATION EXIT
ADDRESS DATA ADDRESS DATA ADDRESS DATA
0 Write 5555H AAH 5555H AAH 5555H AAH
1 Write 2AAAH 55H 2AAAH 55H 2AAAH 55H
2 Write 5555H 90H 5555H 80H 5555H F0H
3 Write - - 5555H AAH - -
4 Write - - 2AAAH 55H - -
5 Write - - 5555H 60H - -
Pause 10 µ S Pause 10 µ S Pause 10 µ S
Software Product Identification Acquisition Flow
Product Identification Entry (1)
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 80
to
address 5555
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 60
to
address 5555
Product Identification Mode (2,3)
Read address = 0
data = DA
Read address = 1
data = C8
Product Identification Exit (1)
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data FO
to
address 5555
Normal Mode
(4)
Pause 10 S µ
Pause 10 S µ
Notes for software product identification:
(1) Data format: DQ7
− DQ0 (Hex); address format: A14 − A0 (Hex).
(2) A1 − A16 = V IL ; manufacture code is read for A0 = V IL ; device code is read for A0 = V IH .
(3) The device does not remain in identification mode if power down.
(4) The device returns to standard operation mode.
(5) This product supports both the JEDEC standard 3 byte command code sequence and original 6 byte command code
sequence. For new designs, Winbond recommends that the 3 byte command code sequence be used.