Qorivva MPC5 Series Manual page 82

Daisy-Chain Example
TAP1
IR
TDI
DR
IR: Instruction register length
Daisy chains can be configured using a PRACTICE script (*.cmm) or the SYStem.CONFIG.state window.
Example: This script explains how to obtain the individual IR and DR values for the above daisy chain.
SYStem.CONFIG.state /Jtag
SYStem.CONFIG IRPRE
SYStem.CONFIG IRPOST 12.
SYStem.CONFIG DRPRE
SYStem.CONFIG DRPOST
Qorivva MPC5xxx/SPC5xx Debugger and NEXUS Trace 82
IRPOST
TAP2
4 IR 3
1 DR 1
DRPOST
DR: Data register length
6.
1.
3.
©1989-2021 Lauterbach GmbH
TAP3
IR 5
DR 1
Chip: The chip you want to debug
; optional: open the window
; IRPRE: There is only one TAP.
; So type just the IR bits of TAP4, i.e. 6.
; IRPOST: Add up the IR bits of TAP1, TAP2
; and TAP3, i.e. 4. + 3. + 5. = 12.
; DRPRE: There is only one TAP which is
; in BYPASS mode.
; So type just the DR of TAP4, i.e. 1.
; DRPOST: Add up one DR bit per TAP which
; is in BYPASS mode, i.e. 1. + 1. + 1. = 3.
; This completes the configuration.
IRPRE
TAP4
IR
Chip
DR
DRPRE
6
TDO
1