EP1C12F256I7N Datasheet, PDF (345/385 Pages) List of Unclassifed Manufacturers – Cyclone Device Handbook, Volume 1

Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
f
Refer to the configuration chapter in the appropriate device handbook
for more information about configuring the FPGAs in AS mode or other
configuration modes.
Multiple devices can be configured by a single EPCS device. However,
serial configuration devices cannot be cascaded. Refer to Table 14–1 to
ensure the programming file size of the cascaded FPGAs does not exceed
the capacity of a serial configuration device. Figure 14–4 shows the AS
configuration scheme with multiple FPGAs in the chain. The first FPGA
is the configuration master and has its MSEL[] pins set to AS mode. The
following FPGAs are configuration slave devices and have their MSEL[]
pins set to PS mode.
Figure 14–4. Multiple Devices in AS Mode Note (5)
V_CC (1)
V_CC (1)
V_CC (1)
10 k9
10 k9
10 k9
Serial
Configuration
Device (2)
DATA
DCLK
nCS
ASDI
Cyclone FPGA (Master)
CONF_DONE
nSTATUS
nCONFIG
nCE
DATA0
DCLK
nCSO
ASDO
nCEO
MSEL[1..0] ⁰⁰ (3)
Cyclone FPGA (Slave)
CONF_DONE
nSTATUS
nCONFIG
nCE
DATA0
DCLK
nCEO
N.C.
MSEL[1..0] ⁰¹ (4)
Notes to Figure 14–4:
(1) V_CC = 3.3 V.
(2) Serial configuration devices cannot be cascaded.
(3) Connect the FPGA MSEL[] input pins to select the AS configuration mode. For details, refer to the appropriate
FPGA family chapter in the Configuration Handbook.
(4) Connect the FPGA MSEL[] input pins to select the PS configuration mode. For details, refer to the appropriate
FPGA family chapter in the Configuration Handbook.
(5) For more information about configuration pin I/O requirements in an AS scheme for a Cyclone III FPGA, refer to
the Configuring Cyclone III Devices chapter in volume 1 of the Cyclone III Device Handbook.
Altera Corporation
May 2008
14–11
Cyclone Handbook, Volume 1