Active Serial Configuration (Serial Configuration Devices)
Figure 13–5. Multiple Device AS Configuration When FPGAs Receive the Same Data with Multiple SOFs
Cyclone II Device Slave
nSTATUS
CONF_DONE
nCONFIG
nCE
V
V
V
V
CC
(1)
(1)
(1)
(3)
CC
CC
CC
nCEO
N.C. (4)
V
CC
DATA0
DCLK
10 k
10 k
10 k
10 k
MSEL0
MSEL1
Cyclone II Device Master
Cyclone II Device Slave
nSTATUS
nSTATUS
CONF_DONE
nCONFIG
CONF_DONE
nCONFIG
Serial
Configuration
Device
nCE
nCEO
nCE
nCEO
N.C. (4)
V
CC
V
CC
Data
DCLK
nCS
DATA0
DCLK
nCSO
ASDO
DATA0
DCLK
MSEL0
MSEL1
MSEL0
MSEL1
ASDI
Cyclone II Device Slave
nSTATUS
CONF_DONE
nCONFIG
nCE
nCEO
N.C. (4)
V
CC
DATA0
DCLK
MSEL0
MSEL1
Notes to Figure 13–5:
(1) Connect the pull-up resistors to a 3.3-V supply.
(2) Connect the pull-up resistor to the VCCIO supply voltage of I/O bank that the nCEOpin resides in.
(3) The nCEOpin can be left unconnected or used as a user I/O pin when it does not feed another device’s nCEpin.
13–16
Altera Corporation
February 2007
Cyclone II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
