EPCS4 datasheet(33/38 Pages) ALTERA

33 / 38 page

Chapter 3: Serial Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet

3–33

Pin Information

Altera Corporation

Configuration Handbook (Complete Two-Volume Set)

Pin Information

As shown in Figure 3–21 and Figure 3–22, the serial configuration device is an 8-pin or

16-pin device. The control pins on the serial configuration device are: serial data

output (DATA), active serial data input (ASDI), serial clock (DCLK), and chip select

(nCS). Table 3–23 lists the serial configuration device's pin descriptions.

Figure 3–21 shows the Altera serial configuration device 8-pin SOIC package and its

pin-out diagram.

Figure 3–22 shows the Altera serial configuration device 16-pin SOIC package and its

pin-out diagram.

Figure 3–21. Altera Serial Configuration Device 8-Pin SOIC Package Pin-Out Diagram

Figure 3–22. Altera Serial Configuration Device 16-Pin SOIC Package Pin-Out Diagram

Note to Figure 3–22:

(1) These pins can be left floating or connected to VCC or GND, whichever is more convenient on the board.

VCC

DCLK

ASDI

VCC

GND

nCS

DATA

EPCS1, EPCS4,

or EPCS16

DCLK

ASDI

N.C.

VCC

N.C.

GND

VCC

nCS

DATA

N.C.

EPCS16,

EPCS64,

or EPCS128

3(1)

4(1)

14(1)

13(1)

5(1)

6(1)

12(1)

11(1)

Table 3–23. Serial Configuration Device Pin Description (Part 1 of 2)

Name

Pin Number

in 8-Pin

SOIC

Package

Pin Number

in 16-Pin

SOIC

Package

Pin Type

Description

DATA

Output

The DATA output signal transfers data serially out of the serial

configuration device to the FPGA during read/configuration operation.

During read/configuration operations, the serial configuration device

is enabled by pulling nCS low. The DATA signal transitions on the

falling edge of DCLK.

ASDI

Input

The AS data input signal is used to transfer data serially into the serial

configuration device. It receives the data that should be programmed

into the serial configuration device. Data is latched on the rising edge

of DCLK.

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