AT697F datasheet(12/155 Pages) ATMEL

12 / 155 page

7703C–AERO–6/09

AT697F ADVANCE INFORMATION

A low-to-high transition on this active high input will generate break condition and put the pro-

cessor in debug mode.

DSUEN - DSU enable (input)

The active high input enables the DSU unit. If de-asserted, the DSU trace buffer will continue to

operate but the processor will not enter debug mode.

DSURX - DSU receiver (input)

This active high input provides the data to the DSU communication link receiver

DSUTX - DSU transmitter (output)

This active high input provides the output from the DSU communication link transmitter.

JTAG

TCK - Test Clock (input)

Used to clock serial data into boundary scan latches and control sequence of the test state

machine. TCK can be asynchronous with CLK.

TMS - Test Mode select (input)

Primary control signal for the state machine. Synchronous with TCK. A sequence of values on

TMS adjusts the current state of the TAP.

TDI - Test data input (input)

Serial input data to the boundary scan latches. Synchronous with TCK

TDO - Test data output (output)

Serial output data from the boundary scan latches. Synchronous with TCK

TRST - Test Reset (input)

Resets the test state machine. Can be asynchronous with TCK. Shall be grounded for end

application.

PCI Arbiter

AREQ*[3:0] - PCI bus request (Input)

When asserted, these active low inputs indicate that a PCI agent is requesting the bus.

AGNT*[3:0] - PCI bus grant (Output)

When asserted, these active low outputs indicate that a PCI agent is granted the PCI bus.

AT697F Datasheet(PDF) 12 Page - ATMEL Corporation