600 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID 648364
Date 05/10/2022
Document Table of Contents

I/O Signal Planes and States

Power Planes and States for Testability Signals

Signal Name

Power Plane

Resistors

During Reset1

Immediately after Reset1

S4/S5

Deep Sx

PCH_​JTAG_​TCK

Primary

Strong Internal Pull-Down

Driven Low

Driven Low

Driven Low

OFF

PCH_​JTAG_​TMS

Primary

Internal Pull-Up

Driven High

Driven High

Driven High

OFF

PCH_​JTAG_​TDI

Primary

Internal Pull-Up

Driven High

Driven High

Driven High

OFF

PCH_​JTAG_​TDO

Primary

External Pull-Up

Undriven

Undriven

Undriven

OFF

PCH_​JTAGX1

Primary

Internal Strong Pull-Up (as TDO Input),

Internal Strong Pull-Down (as TCK Output)

Driven High

Driven High / Driven Low

Driven High / Driven Low

OFF

DBG_​PMODE

Primary

Internal Pull-Up

Driven High

Driven High

Driven High

OFF

TRIGGER_​IN

Primary

Internal Pull-Down

Driven Low

Driven Low

Undriven

OFF

TRIGGER_​OUT

Primary

Internal Pull-Down

Driven Low

Driven Low

Undriven

OFF

PREQ#

Primary

Strong Pull-Up 60 -100 Ohm

Driven High

Driven High

Undriven

OFF

PRDY#

Primary

Strong Pull-Up 60 -100 Ohm

Driven High

Driven High

Undriven

OFF

Notes:
  1. This signal is used in common JTAG topology to take in last device's TDO to DCI. The only planned supported topology is the Shared Topology. Thus, this pin will operate as TCK mode.
  2. Reset reference for primary well pins is RSMRST#.