at49lh002 ATMEL Corporation, at49lh002 Datasheet - Page 24

• Manufacturer Part Number: at49lh002
• Description: At49lh002 2-megabit Firmware Hub And Low-pin Count Flash Memory
• Manufacturer: ATMEL Corporation

Table 19. Status Register (SR)
Note:
PRODUCT ID READ: The Product ID Read mode is used to identify the product type and the manufacturer as Atmel. Fol-
lowing the Product ID Read command, read cycles from the addresses shown in Table 20 retrieve the manufacturer and
device ID code. To exit the Product ID Read mode, any valid command can be written to the device.
Table 20. Product ID Address and Data
24
Code
Manufacturer ID
Device ID
SR
Bit
3:2
7
6
5
4
1
0
1. SR[1] does not provide a continuous indication of the Write-Lock bit, TBL pin, or WP values. The WSM interrogates the
Name
Write State Machine
Status (WSM)
Reserved
Erase Status
Program Status
Reserved
Device Protect
Status
Reserved
AT49LH002
Write-Lock bit, TBL pin, or WP pin only after a sector erase or program operation. Depending on the attempted operation, it
informs the system whether or not the selected sector is locked.
(1)
Description
Reserved for future use.
Reserved for future use.
Reserved for future use.
0
1
0
1
0
1
0
1
Device is BUSY.
A program or erase cycle is in progress. SR[6-1] values are invalid when SR[7] is 0.
Device is READY.
The device is ready for any operation.
Erase successful.
The sector erase operation completed successfully.
Erase failed.
The sector erase operation failed. If SR[5,4] are 1, then there was a command sequence
error.
Program successful.
The byte program operation competed successfully.
Program failed.
The program operation failed. If SR[5,4] are 1, then there was a command sequence error.
Sector is unlocked.
The sector being erased or programmed is unlocked (not protected).
Sector is hardware write protected or write-locked.
The sector being erased or programmed is either hardware write protected by the TBL or
WP pin, or it is write-locked.
Address
000000H
000001H
Data
1FH
E9H
3377B–FLASH–9/03