EPC1064V Datasheet, PDF (9/36 Pages) List of Unclassifed Manufacturers – Configuration Devices for SRAM-Based LUT Devices

Configuration Devices for SRAM-Based LUT Devices Data Sheet
Figure 4. ACEX 1K, APEX 20K, APEX II, FLEX 10K, FLEX 6000, or Mercury Device Configured with an EPC2,
EPC1, or EPC1441 Configuration Device Note (1)
APEX II, ACEX 1K, Mercury, APEX 20KC,
APEX 20K & FLEX 10K Devices
V_CC
V_CC
V_CC
LUT-Based PLD (3)
DCLK
DATA0
nSTATUS
CONF_DONE
nCONFIG
Configuration
(2)
(2)
(2)
Device
DCLK
DATA
OE
nCS
nINIT_CONF (4)
MSEL0
MSEL1
nCEO
(5)
nCE
GND
APEX 20KE Devices
GND
V_CC
V_CCINT (6) V_CC
APEX 20KE PLD (7)
DCLK
DATA0
nSTATUS
CONF_DONE
nCONFIG
MSEL0
MSEL1
nCEO
nCE
(2)
(5)
(2)
(2)
(8)
Configuration
Device
DCLK
DATA
OE
nCS
nINIT_CONF (4)
GND
GND
Notes to Figure 4:
(1) Do not use EPC2 devices to configure FLEX 6000 devices.
(2) The pull-up resistor should be connected to the same supply voltage as the configuration device. All pull-up
resistors are 1 kΩ. APEX 20KE pull up resistors are 10 kΩ. The OE, nCS, and nINIT_CONF pins on EPC2, EPC4,
EPC8, and EPC16 devices have internal, user-configurable 1-kΩ pull-up resistors. If internal pull-up resistors are
used, external pull-up resistors should not be used on these pins. The Quartus II software uses the internal pull-up
resistors by default. To turn off the internal pull-up resistors, check the Disable nCS and OE pull-ups on configuration
device option when generating programming files.
(3) The diagram shows an APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 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. EPC4, EPC8,
EPC16, and EPC2 configuration devices cannot be used with FLEX 6000 devices. All other connections are the same
for APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX devices.
(4) The nINIT_CONF pin is only available on EPC2, EPC4, EPC8, and EPC16 devices and has an internal pull up of 1 kΩ
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-kΩ resistor.
(5) The nCEO pin is left unconnected.
(6) To ensure successful configuration between APEX 20KE and configuration devices in all possible power-up
sequences, pull up nCONFIG to V_CCINT.
(7) This diagram is for APEX 20KE devices only.
(8) To isolate the 1.8-V and 3.3-V power supplies when configuration APEX 20KE devices, add a diode between the
APEX 20KE device’s nCONFIG pin and the configuration device’s nINIT_CONF pin. Select a diode with a threshold
voltage (V_T) less than or equal to 0.7 V. The diode will make the nINIT_CONF pin an open-drain pin; the pin will
only be able to drive low or tri-state.
Altera Corporation
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