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12
Altera Corporation
Configuration Devices for ACEX, APEX, FLEX & Mercury Devices Data Sheet
1
A mixture of ACEX 1K, APEX 20K, APEX 20KE, and Mercury
devices can be configured in the same chain. A mixture of
FLEX 10K, FLEX 10KA, FLEX 10KE, and 5.0-V and 3.3-V
FLEX 6000 devices can be configured in the same chain. See
“
Configuration Chain with Multiple Voltage Levels
”
on page 19
.
Figure 5. ACEX 1K, APEX 20K, FLEX 10K, FLEX 6000, or Mercury Device Configured with Two EPC2 or EPC1
Configuration Devices
Notes:
(1)
(2)
The pull-up resistor should be connected to the same supply voltage as the configuration device.
The diagram shows an ACEX 1K, APEX 20K, FLEX 10K, or Mercury device, which has
MSEL0
and
MSEL1
tied to
ground. For FLEX 6000 devices,
MSEL
is tied to ground, and the
DATA0
pin is named
DATA
. EPC2 cannot be used
with FLEX 6000 devices. All other connections are the same for ACEX 1K, APEX 20K, FLEX 10K, FLEX 6000, and
Mercury devices.
All pull-up resistors are 1 k
(APEX 20KE pull-resistors are 10k
). The
OE
and
nCS
pins on EPC2 devices have
internal, user-configurable 1-k
pull-up resistors. If internal pull-up resistors are used, external pull-up resistors
should not be used on these pins.
The
nINIT_CONF
pin is only available on EPC2 devices and has an internal pull up of 1 k
that is always active. If
nINIT_CONF
is not available or not used,
nCONFIG
must be pulled to V
CC
either directly or through a 1-k
resistor.
(3)
(4)
Figure6
shows two ACEX 1K, APEX 20K, FLEX 10K, FLEX 6000, or
Mercury devices configured with two EPC2 or EPC1 devices.
Configuration
Device 1
DCLK
DATA
OE
nCS
nINIT_CONF (4)
MSEL0
MSEL1
DCLK
DATA0
nSTATUS
CONF_DONE
nCONFIG
VCC
VCC
GND
GND
(3)
nCE
DCLK
DATA
nCS
OE
Configuration
Device 2
(3)
(1)
(1)
nCASC
ACEX 1K, APEX 20K, FLEX 10K,
FLEX 6000, or Mercury Device (2)