EX128-CS100 datasheet(14/49 Pages) ACTEL

14 / 49 page

eX Family FPGAs

1- 10

v4.3

JTAG Instructions

Table 1-6 lists the supported instructions with the

corresponding IR codes for eX devices.

Table 1-7 lists the codes returned after executing the

IDCODE instruction for eX devices. Note that bit 0 is

always "1." Bits 11-1 are always "02F", which is Actel's

manufacturer code.

Programming

Device programming is supported through Silicon

Sculptor series of programmers. In particular, Silicon

Sculptor II is a compact, robust, single-site and multi-site

device programmer for the PC.

With standalone software, Silicon Sculptor II allows

concurrent programming of multiple units from the

same PC, ensuring the fastest programming times

possible. Each fuse is subsequently verified by Silicon

Sculptor II to insure correct programming. In addition,

integrity

tests

ensure

that

extra

fuses

are

programmed. Silicon Sculptor II also provides extensive

hardware self-testing capability.

The procedure for programming an eX device using

Silicon Sculptor II is as follows:

1. Load the .AFM file

2. Select the device to be programmed

3. Begin programming

When the design is ready to go to production, Actel

offers

device

volume-programming

services

either

through

distribution

partners

via

in-house

programming from the factory.

For more details on programming eX devices, please

refer to the Programming Antifuse Devices application

note and the Silicon Sculptor II User's Guide.

Probing Capabilities

eX devices provide internal probing capability that is

accessed with the JTAG pins. The Silicon Explorer II

Diagnostic hardware is used to control the TDI, TCK, TMS

and TDO pins to select the desired nets for debugging.

The user simply assigns the selected internal nets in the

Silicon Explorer II software to the PRA/PRB output pins

for observation. Probing functionality is activated when

the BST pins are in JTAG mode and the TRST pin is driven

HIGH or left floating. If the TRST pin is held LOW, the

TAP controller will remain in the Test-Logic-Reset state so

no probing can be performed. The Silicon Explorer II

automatically places the device into JTAG mode, but the

user must drive the TRST pin HIGH or allow the internal

pull-up resistor to pull TRST HIGH.

When you select the "Reserve Probe Pin" box as shown

in Figure 1-12 on page 1-9, the layout tool reserves the

PRA and PRB pins as dedicated outputs for probing. This

"reserve" option is merely a guideline. If the Layout tool

requires that the PRA and PRB pins be user I/Os to

achieve successful layout, the tool will use these pins for

user I/Os. If you assign user I/Os to the PRA and PRB pins

and select the "Reserve Probe Pin" option, Designer

Layout will override the "Reserve Probe Pin" option and

place your user I/Os on those pins.

To allow for probing capabilities, the security fuse must

not be programmed. Programming the security fuse will

disable the probe circuitry. Table 1-8 on page 1-11

summarizes the possible device configurations for

probing once the device leaves the "Test-Logic-Reset"

JTAG state.

Silicon Explorer II Probe

Silicon Explorer II is an integrated hardware and

software solution that, in conjunction with Actel’s

Designer software tools, allow users to examine any of

the internal nets of the device while it is operating in a

prototype or a production system. The user can probe

into an eX device via the PRA and PRB pins without

changing the placement and routing of the design and

without

using

any

additional

resources.

Silicon

Table 1-6 • 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 1-7 • IDCODE for eX Devices

Device

Revision

Bits 31-28

Bits 27-12

eX64

40B2, 42B2

eX128

40B0, 42B0

eX256

40B5, 42B5

eX64

40B2, 42B2

eX128

40B0, 42B0

eX256

40B5, 42B5

EX128-CS100 Datasheet(PDF) 14 Page - Actel Corporation

EX128-CS100 Datasheet(HTML) 14 Page - Actel Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49

Datasheet Download

Link URL