AM29F100B-75EI データシートの表示（PDF） - Advanced Micro Devices
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AM29F100B-75EI
Advanced Micro Devices
AM29F100B-75EI Datasheet PDF : 34 Pages
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Table 1.1 Am29F100 User Bus Operations (BYTE = VIH)
Operation
CE OE WE
A0
A1
A6
A9
Autoselect, AMD Manuf. Code (1)
L
L
H
L
L
L
VID
Autoselect Device Code (1)
L
L
H
H
L
L
VID
Read
L
L
X
A0
A1
A6
A9
Standby
H
X
X
X
X
X
X
Output Disable
L
H
H
X
X
X
X
Write
L
H
L
A0
A1
A6
A9
Verify Sector Protect (2)
L
L
H
L
H
L
VID
Temporary Sector Unprotect
X
X
X
X
X
X
X
Hardware Reset
X
X
X
X
X
X
X
AMD
DQ0–DQ15 RESET
Code
H
Code
H
DOUT
H
HIGH Z
H
HIGH Z
H
DIN
H
Code
H
X
VID
HIGH Z
L
Table 1.2 Am29F100 User Bus Operations (BYTE = VIL)
Operation
CE OE WE A0 A1 A6 A9 DQ0–DQ7 DQ8–DQ15 RESET
Autoselect, AMD Manuf. Code (1) L
L
H
L
L
L VID
Code
HIGH Z
H
Autoselect Device Code (1)
L
L
H
H
L
L VID
Code
HIGH Z
H
Read
L
L
X A0 A1 A6 A9
DOUT
HIGH Z
H
Standby
HX
X
X
X
X
X
HIGH Z HIGH Z
H
Output Disable
L
HHX
X
X
X
HIGH Z HIGH Z
H
Write
L H L A0 A1 A6 A9
DIN
HIGH Z
H
Verify Sector Protect (2)
L
L
H
L
H
L VID
Code
HIGH Z
H
Temporary Sector Unprotect
XXXXXXX
X
HIGH Z
VID
Hardware Reset
X
X
X
X
X
X
X
HIGH Z HIGH Z
L
Legend:
L = logic 0, H = logic 1, X = Don’t Care. See Characteristics for voltage levels.
Notes:
1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 4.
2. Refer to the section on Sector Protection.
Read Mode
The Am29F100 has two control functions which must be
satisfied in order to obtain data at the outputs. CE is the
power control and should be used for device selection.
OE is the output control and should be used to gate data
to the output pins if a device is selected.
Address access time (tACC) is equal to the delay from
stable addresses to valid output data. The chip enable
access time (tCE) is the delay from stable addresses and
stable CE to valid data at the output pins. The output en-
able access time is the delay from the falling edge of OE
to valid data at the output pins (assuming the addresses
have been stable for at least tACC–tOE time).
Standby Mode
There are two ways to implement the standby mode on
the Am29F100 device, both using the CE pin.
A CMOS standby mode is achieved with the CE input
held at VCC ± 0.5 V. Under this condition the current is
typically reduced to less than 100 µA. A TTL standby
mode is achieved with the CE pin held at VIH. Under this
condition the current is typically reduced to 1 mA.
Am29F100T/Am29F100B
1-39
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