EP4SE360F35I4 Datasheet, PDF (358/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

10–22
Chapter 10: Configuration, Design Security, and Remote System Upgrades in Stratix IV Devices
Fast Active Serial Configuration (Serial Configuration Devices)
Figure 10–8 shows the multi-device fast AS configuration when the devices receive
the same data using a single .sof.
Figure 10–8. Multi-Device Fast AS Configuration When the Devices Receive the Same Data Using a Single .sof
V_{CCPGM (1)} V_{CCPGM (1)} V_{CCPGM (1)}
10 kΩ 10 kΩ 10 kΩ
Stratix IV
Device Slave
nSTATUS
CONF_DONE nCEO
N.C.
nCONFIG
nCE
DATA0
DCLK
MSEL2
MSEL1
MSEL0
V_CCPGM
Serial Configuration
Device
DATA
DCLK
nCS
ASDI
GND
Stratix IV
Device Master
nSTATUS
CONF_DONE
nCONFIG
nCE
nCEO
N.C.
DATA0
DCLK
nCSO
ASDO
GND
V_CCPGM
MSEL2
MSEL1
MSEL0
GND
Buffers (2)
Stratix IV
Device Slave
nSTATUS
CONF_DONE
nCONFIG
nCE
nCEO
GND
N.C.
DATA0
DCLK
MSEL2
MSEL1
MSEL0
V_CCPGM
Stratix IV
Device Slave
nSTATUS
CONF_DONE
nCONFIG
nCE
nCEO
GND
N.C.
DATA0
DCLK
MSEL2
MSEL1
MSEL0
V_CCPGM
GND
Notes to Figure 10–8:
(1) Connect the pull-up resistors to V_CCPGM at a 3.0-V supply.
(2) Connect the repeater buffers between the Stratix IV master and slave device(s) for DATA[0] and DCLK. This is to prevent potential signal
integrity and clock skew problems.
Estimating Active Serial Configuration Time
Active serial configuration time is dominated by the time it takes to transfer data from
the serial configuration device to the Stratix IV device. This serial interface is clocked
by the Stratix IV DCLK output (generated from an internal oscillator) and must be set to
40 MHz (25 ns).Therefore, the minimum configuration time estimate for an EP4SE230
device (94, 600, 000 bits of uncompressed data) is:
RBF Size × (minimum DCLK period / 1 bit per DCLK cycle) = estimated minimum
configuration time
94, 600, 000 bits × (25 ns / 1 bit) = 2365 ms
Enabling compression reduces the amount of configuration data that is transmitted to
the Stratix IV device, which also reduces configuration time. On average, compression
reduces configuration time, depending on the design.
Stratix IV Device Handbook
Volume 1
September 2012 Altera Corporation