FG256 datasheet(14/108 Pages) ACTEL

14 / 108 page

SX-A Family FPGAs

1- 10

v5.3

JTAG Instructions

Table 1-7 lists the supported instructions with the corresponding IR codes for SX-A devices.

Table 1-8 lists the codes returned after executing the IDCODE instruction for SX-A devices. Note that bit 0 is always '1'.

Bits 11-1 are always '02F', which is the Actel manufacturer code.

Table 1-7 • JTAG Instruction Code

Instructions (IR4:IR0)

Binary Code

EXTEST

00000

SAMPLE/PRELOAD

00001

INTEST

00010

USERCODE

00011

IDCODE

00100

HighZ

01110

CLAMP

01111

Diagnostic

10000

BYPASS

11111

Reserved

All others

Table 1-8 • JTAG Instruction Code

Device

Process

Revision

Bits 31-28

Bits 27-12

A54SX08A

0.22 µ

8, 9

40B4, 42B4

A, B

40B4, 42B4

A54SX16A

0.22 µ

40B8, 42B8

0.25 µ

22B8

A54SX32A

0.2 2µ

40BD, 42BD

0.25 µ

22BD

A54SX72A

0.22 µ

40B2, 42B2

0.25 µ

22B2

FG256 Datasheet(PDF) 14 Page - Actel Corporation

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