QL4090-2PB456M Ver la hoja de datos (PDF) - QuickLogic Corporation

Número de pieza

componentes Descripción

Fabricante

QL4090-2PB456M

Military QuickRAM

QuickLogic Corporation 

Military QuickRAM Family Data Sheet Rev. C

• Bypass Instruction. The Bypass Instruction allows data to skip a device boundary scan entirely, so the

data passes through the bypass register. The Bypass instruction allows users to test a device without passing

through other devices. The bypass register is connected between the TDI and TDO pins, allowing serial data

to be transferred through a device without affecting the operation of the device.

Pin Descriptions

Table 16: Pin Descriptions

Pin

TDI/RSI

Function

Test Data In for JTAG /RAM init.

Serial Data In

Description

Hold HIGH during normal operation. Connects to serial

PROM data in for RAM initialization. Connect to VCC if

unused.

TRSTB/RRO

TMS

Active low Reset for JTAG /RAM init.

reset out

Test Mode Select for JTAG

Hold LOW during normal operation. Connects to serial PROM

reset for RAM initialization. Connect to GND if unused.

Hold HIGH during normal operation. Connect to VCC if not

used for JTAG.

TCK

TDO/RCO

Test Clock for JTAG

Test data out for JTAG /RAM init.

clock out

Hold HIGH or LOW during normal operation. Connect to VCC

or ground if not used for JTAG.

Connect to serial PROM clock for RAM initialization. Must be

left unconnected if not used for JTAG or RAM initialization.

STM

Special Test Mode

Must be grounded during normal operation.

I/ACLK

I/GCLK

I

I/O

High-drive input and/or array

network driver

High-drive input and/or global

network driver

High-drive input

Input/Output pin

Can be configured as either or both.

Can be configured as either or both.

Use for input signals with high fanout.

Can be configured as an input and/or output.

VCC

VCCIO

GND

Power supply pin

Input voltage tolerance pin

Ground pin

Connect to 3.3 V supply.

Connect to 5.0 V supply if 5 V input tolerance is required,

otherwise connect to 3.3 V supply.

Connect to ground.

GND/THERM Ground/Thermal pin

Available on 456-PBGA only. Connect to ground plane on

PCB if heat sinking desired. Otherwise may be left

unconnected.

© 2007 QuickLogic Corporation

www.quicklogic.com

•

•••

••

13

Share Link: