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8 reset, 9 jumpers, 8 reset - 17 3.9 jumpers - 17 – Kontron AT8901M User Manual

Page 47: At8901m hardware description

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AT8901M

Hardware Description

Page 3 - 17

AT8901M User Guide

3.8

Reset

The reset chain is based on seven elements. The first element in the chain is the voltage supply
monitor, followed by the CPLD, FUM, IPMC, Payload voltage, PPC and Base Interface and fi-
nally the Fabric Interface.

The reset switch will perform a reset on the CPU when pressed for less than 1 second and a
complete board reset (including IPMI) when pressed for more than 2 seconds.

3.9

Jumpers

Five jumpers in the upper right corner allow debug settings (J11). The IPMI override jumpers
enable bypassing communication with the ShMC for bench operation. The JTAG jumpers con-
figure the boundary scan path. JTAG operation requires the use of an RTM.

Warning!

Operation with any of these jumpers set is not supported by the standard appli-
cation software.

Table 3-16: Jumper Settings (

Default Setting)

FWPD - Flash Write Enable

Write Enable

in

Write Protect

out

IPMC0 - Front Board IPMI Override

ShMC Bypass

in

Normal Operation

out

IPMC1 - AMC IPMI Override

ShMC Bypass

in

Normal Operation

out

JTAG_AMC - AMC JTAG Integration

Included in JTAG Chain

in

Excluded from JTAG Chain

out

JTAG_IPMC - IPMC JTAG

Restrict JTAG to IPMC

in

Normal JTAG Operation

out