EPC4 datasheet(20/36 Pages) ALTERA

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Configuration Devices for SRAM-based LUT Devices Data Sheet

EPC1 and EPC1441 devices can replace the EPC1213, EPC1064, and

EPC1064V configuration devices. The EPC1 or EPC1441 device

automatically emulates the EPC1213, EPC1064, or EPC1064V when it is

programmed with the appropriate POF. When the EPC1 or EPC1441

device is programmed with an EPC1213, EPC1064, or EPC1064V POF, the

FLEX 8000 device drives the EPC1 or EPC1441 device’s OE pin high and

clocks the EPC1 or EPC1441 device. One EPC1 device can store more

configuration data than the EPC1064, EPC1064V, EPC1213, or EPC1441

device. Therefore, designers can use one type of configuration device for

all FLEX devices. In addition, a single EPC1 or EPC1441 device can

configure any FLEX 8000 device.

For multi-device configuration of FLEX 8000 devices, the nCASC and nCS

pins provide handshaking between multiple configuration devices,

allowing several cascaded EPC1 or EPC1213 devices to serially configure

multiple FLEX 8000 devices. The EPC1441, EPC1064, and EPC1064V do

not support data cascading. Figure 8 shows a FLEX 8000 device

configured with a single EPC1, EPC1441, EPC1213, EPC1064, or

EPC1064V configuration device.

Figure 8. FLEX 8000 Device Configured with an EPC1, EPC1441, EPC1213,

EPC1064, or EPC1064V Configuration Device

Notes to

Figure 8:

(1)

The pull-up resistor should be connected to the same supply voltage as the

configuration device.

(2)

All pull-up resistors are 1 k

Ω.

Figure 9 shows three FLEX 8000 devices configured with two EPC1 or

EPC1213 configuration devices.

FLEX 8000 Device

"0"

Configuration

Device

VCC

nCS

DCLK

nS/P

MSEL1

MSEL0

DATA0

nCONFIG

CONF_DONE

nSTATUS

DCLK

DATA

VCC

(2)

VCC

(2)

(1)

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