ATF22V10BQ ATMEL Corporation, ATF22V10BQ Datasheet - Page 5

• Manufacturer Part Number: ATF22V10BQ
• Description: High- Performance Ee Pld
• Manufacturer: ATMEL Corporation

Input Test Waveforms and
Measurement Levels
t
Pin Capacitance
f = 1 MHz, T = 25°C
Note:
Power-up Reset
The registers in the ATF22V10Bs are designed to reset
during power-up. At a point delayed slightly from V
ing V
output state will depend on the polarity of the output buffer.
This feature is critical for state machine initialization. How-
ever, due to the asynchronous nature of reset and the
uncertainty of how V
following conditions are required:
1. The V
2. After reset occurs, all input and feedback setup times
3. The clock must remain stable during t
Preload of Registered Outputs
The ATF22V10B’s registers are provided with circuitry to
allow loading of each register with either a high or a low.
This feature will simplify testing since any state can be
forced into the registers to control test sequencing. A
JEDEC file with preload is generated when a source file
with vectors is compiled. Once downloaded, the JEDEC file
preload sequence will be done automatically by most of the
approved programmers after the programming.
R
C
C
, t
IN
OUT
must be met before driving the clock pin high, and
F
< 3 ns
RST
1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
, all registers will be reset to the low state. The
CC
rise must be monotonic,
(1)
CC
actually rises in the system, the
PR
.
Typ
5
6
CC
cross-
Max
8
8
Output Test Loads
* All except -7 which is R2 = 300
Security Fuse Usage
A single fuse is provided to prevent unauthorized copying
of the ATF22V10B fuse patterns. Once programmed, fuse
verify and preload are inhibited. However, the 64-bit User
Signature remains accessible.
The security fuse should be programmed last, as its effect
is immediate.
Parameter
t
V
PR
RST
Commercial
Units
pF
pF
Description
Power-up
Reset Time
Power-up
Reset
Voltage
Conditions
V
V
IN
OUT
= 0V
= 0V
Typ
600
3.8
Military
1,000
Max
4.5
Units
ns
V
5