EP3SL150F780I3N Altera, EP3SL150F780I3N Datasheet - Page 374

• Manufacturer Part Number: EP3SL150F780I3N
• Description: Stratix III
• Manufacturer: Altera

Fast Passive Parallel Configuration
Figure 11–4. Multi-Device FPP Configuration Using an External Host
Note to
(1)
11–14
Stratix III Device Handbook, Volume 1
(MAX II Device or
Microprocessor)
You should connect the pull-up resistor to a supply that provides an acceptable input signal for all devices in the
chain. V
host.
External Host
ADDR DATA[7..0]
Figure
Memory
CC
11–4:
should be high enough to meet the V
10 kΩ
V
CC
The MAX II device can also monitor the CONF_DONE and INIT_DONE
pins to ensure successful configuration. The MAX II device must monitor
the CONF_DONE pin to detect errors and determine when programming
completes. If all configuration data is sent, but the CONF_DONE or
INIT_DONE signals have not gone high, the MAX II device will
reconfigure the target device.
1
When the device is in user mode, initiating a reconfiguration is done by
transitioning the nCONFIG pin low-to-high. The nCONFIG pin should be
low for at least 2 ms. When nCONFIG is pulled low, the device also pulls
nSTATUS and CONF_DONE low and all I/O pins are tri-stated. Once
nCONFIG returns to a logic high level and nSTATUS is released by the
device, reconfiguration begins.
Figure 11–4
device. This circuit is similar to the FPP configuration circuit for a single
device, except the Stratix III devices are cascaded for multi-device
configuration.
(1)
V
CC
10 kΩ
(1)
GND
If you use the optional CLKUSR pin and the nCONFIG is pulled
low to restart configuration during device initialization, you
need to ensure CLKUSR continues toggling during the time
nSTATUS is low (maximum of 100 ms).
shows how to configure multiple devices using a MAX II
CONF_DONE
nSTATUS
nCE
nCONFIG
DCLK
DATA[7..0]
Stratix III Device 1
IH
specification of the I/O standard on the device and the external
MSEL[2..0]
nCEO
GND
CONF_DONE
nSTATUS
nCE
nCONFIG
DCLK
DATA[7..0]
Stratix III Device 2
Altera Corporation
November 2007
MSEL[2..0]
nCEO
GND
N.C.