a3pn010 Actel Corporation, a3pn010 Datasheet - Page 17

• Manufacturer Part Number: a3pn010
• Description: Proasic 3 Nano Flash Fpgas
• Manufacturer: Actel Corporation

Figure 2-2 • Devices Operating at 1.5 V Core – I/O State as a Function of V
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. The V
Figure 2-3 on page 2-6
When PLL power supply voltage and/or V
± 0.25 V), the PLL output lock signal goes low and/or the output clock is lost. Refer to the
Up/-Down Behavior of Low-Power Flash Devices
and lock recovery.
Internal Power-Up Activation Sequence
Output buffers, after 200 ns delay from input buffer activation.
V
1. Core
2. Input buffers
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
CCI
for more details).
+ VT
Region 1: I/O buffers are OFF
CC
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
activation level is specified as 1.1 V worst-case (see
buffers do not meet V
meet V
same reason, input buffers do not
below specification. For the
IH
A dv a n c e v 0. 1
/V
but slower because V
IL
(except differential
(except differential inputs)
levels, and output
CCI
IH
Radiation-Tolerant ProASIC3 DC and Switching Characteristics
/V
/V
I/Os are functional
I/Os are functional
CC
IL
CC
buffers are ON.
buffers are ON.
OH
levels, and
are below
Region 4: I/O
Region 4: I/O
OH
/V
Min V
levels drop below the V
standard; i.e., 1.425 V or 1.7 V
OL
/V
chapter of the handbook for information on clock
OL
levels.
voltage at a selected I/O
levels.
CCI
or 2.3 V or 3.0 V
CCI
datasheet specification
is
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
CCI
CC
is below specification.
IH
and V
CC
/V
IL
and V
, V
CC
OH
CC
/V
brownout levels (0.75 V
Voltage Levels
OL
CCPLX
, etc.
exceed brownout
Figure 2-2
V
CCI
Power-
and
2 - 5