at49lw080 ATMEL Corporation, at49lw080 Datasheet - Page 16

• Manufacturer Part Number: at49lw080
• Description: 8-megabit Firmware Hub Flash Memory
• Manufacturer: ATMEL Corporation

6.10
6.11
Table 6-8.
16
Bit
7:5
4
3
2
1
0
Lock-down
General-purpose Inputs Register
AT49LW080
General-purpose Input Registers
Function
Reserved
FGPI[4]
Reads status of general-purpose input pin (PLCC-30/TSOP-7)
FGPI[3]
Reads status of general-purpose input pin (PLCC-3/TSOP-15)
FGPI[2]
Reads status of general-purpose input pin (PLCC-4/TSOP-16)
FGPI[1]
Reads status of general-purpose input pin (PLCC-5/TSOP-17)
FGPI[0]
Reads status of general-purpose input pin (PLCC-6/TSOP-18)
When in the FWH interface mode, the default lock-down status of all sectors upon power-up is
not-locked-down (0 state). The lock-down bit for any sector may be set (1 state), but only once,
as future attempted changes to that sector locking register will be ignored. The lock-down bit is
only cleared upon a device reset with RST or INIT. The current lock-down status of a particular
sector can be determined by reading the corresponding lock-down bit. Once a sector’s lock-
down bit is set, the read- and write-lock bits for that sector can no longer be modified and the
sector is locked down in its current state of read and write accessibility.
This register reads the status of the FGPI[4:0] pins on the FWH at power-up. Since this is a
pass-through register, there is no default value as shown in
the GPI pins be in the desired state before FWH4 is brought low for the beginning of the next
bus cycle, and remain in that state until the end of the cycle.
Table
6-5. It is recommended that
1966G–FLASH–3/05