AGL015V2-CS144 ACTEL [Actel Corporation], AGL015V2-CS144 Datasheet - Page 18

• Manufacturer Part Number: AGL015V2-CS144
• Description: IGLOO Low-Power Flash FPGAs with Flash Freeze Technology
• Manufacturer: ACTEL [Actel Corporation]

IGLOO DC and Switching Characteristics
Figure 2-1 • V5 Devices – I/O State as a Function of V
2 -4
Deactivation trip point:
Activation trip point:
V
V
a
d
= 0.85 V ± 0.25 V
= 0.75 V ± 0.25 V
V
V
CC
CC
= 1.575 V
= 1.425 V
PLL Behavior at Brownout Condition
Actel recommends using monotonic power supplies or voltage regulators to ensure proper power-
up behavior. Power ramp-up should be monotonic at least until V
activation levels (see
When PLL power supply voltage and/or VCC levels drop below the V
0.25 V for V5 devices, and 0.75 V ± 0.2 V for V2 devices), the PLL output lock signal goes low and/or
the output clock is lost. Refer to the Brownout Voltage section in the
Low-Power Flash Devices
clock and lock recovery.
Internal Power-Up Activation Sequence
To make sure the transition from input buffers to output buffers is clean, ensure that there is no
path longer than 100 ns from input buffer to output buffer in your design.
V
1. Core
2. Input buffers
3. Output buffers, after 200 ns delay from input buffer activation
CC
Region 1: I/O Buffers are OFF
V
where VT can be from 0.58 V to 0.9 V (typically 0.75 V)
Deactivation trip point:
Activation trip point:
CC
V
V
= V
d
a
= 0.9 V ± 0.3 V
= 0.8 V ± 0.3 V
Figure 2-1
CCI
+ VT
Region 1: I/O buffers are OFF
Region 2: I/O buffers are ON.
I/Os are functional (except differential inputs)
but slower because V
specification. For the same reason, input
buffers do not meet V
output buffers do not meet V
chapter of the
buffers do not meet V
meet V
and
same reason, input buffers do not
below specification. For the
IH
Figure 2-2 on page 2-5
A dv a n c e v 0. 5
/V
but slower because V
IL
(except differential
(except differential inputs)
levels, and output
CCI
IH
ProASIC
CCI
/V
/V
I/Os are functional
I/Os are functional
CC
IL
buffers are ON.
buffers are ON.
OH
levels, and
and V
are below
Region 4: I/O
Region 4: I/O
OH
/V
Min V
standard; i.e., 1.425 V or 1.7 V
OL
/V
®
OL
levels.
voltage at a selected I/O
3
CC
levels.
CCI
and
or 2.3 V or 3.0 V
CCI
Voltage Levels
datasheet specification
is
ProASIC3E
for more details).
Region 3: I/O buffers are ON.
I/Os are functional; I/O DC
specifications are met,
but I/Os are slower because
the V
Region 5: I/O buffers are ON
and power supplies are within
specification.
I/Os meet the entire datasheet
and timer specifications for
speed, V
CC
is below specification.
IH
CC
/V
handbooks for information on
IL
and V
Power-Up/-Down Behavior of
, V
CC
OH
brownout levels (0.75 V ±
/V
OL
CCPLX
, etc.
exceed brownout
V
CCI