Power-On Reset (Por) Circuit; Configuration File Size - Altera Cyclone IV Device Handbook

8–4

Power-On Reset (POR) Circuit

The POR circuit keeps the device in reset state until the power supply voltage levels
have stabilized during device power up. After device power up, the device does not
release nSTATUS until V
configuration and JTAG pins reside) are above the POR trip point of the device.
V
CCINT
1
V
CCA
In some applications, it is necessary for a device to wake up very quickly to begin
operation. Cyclone IV devices offer the fast POR time option to support fast wake-up
time applications. The fast POR time option has stricter power-up requirements when
compared with the standard POR time option. You can select either the fast option or
the standard POR option with the MSEL pin settings.
1
If your system exceeds the fast or standard POR time, you must hold nCONFIG low
until all the power supplies are stable.
f
For more information about the POR specifications, refer to the
Datasheet.
f
For more information about the wake-up time and POR circuit, refer to the
Requirements for Cyclone IV Devices

Configuration File Size

Table 8–2
devices. To calculate the amount of storage space required for multiple device
configurations, add the file size of each device together.
Table 8–2. Uncompressed Raw Binary File (.rbf) Sizes for Cyclone IV Devices (Part 1 of 2)
Cyclone IV Device Handbook,
Volume 1
Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
, V
CCINT
and V are monitored for brown-out conditions after device power up.
CCA
is the analog power to the phase-locked loop (PLL).
lists the approximate uncompressed configuration file sizes for Cyclone IV
Device
Cyclone IV E
, and V (for I/O banks in which the
CCA CCIO
chapter.
EP4CE6
EP4CE10
EP4CE15
EP4CE22
EP4CE30
EP4CE40
EP4CE55
EP4CE75
EP4CE115
Configuration
Cyclone IV Device
Power
Data Size (bits)
2,944,088
2,944,088
4,086,848
5,748,552
9,534,304
9,534,304
14,889,560
19,965,752
28,571,696
May 2013 Altera Corporation