Qorivva MPC5xxx/SPC5xx Debugger and NEXUS Trace
82
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Daisy-Chain Example
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
; optional: open the window
SYStem.CONFIG IRPRE 6.
;
IRPRE
: There is only one TAP.
; So type just the IR bits of TAP4, i.e. 6.
SYStem.CONFIG IRPOST 12.
;
IRPOST
: Add up the IR bits of TAP1, TAP2
; and TAP3, i.e. 4. + 3. + 5. = 12.
SYStem.CONFIG DRPRE 1.
;
DRPRE
: There is only one TAP which is
; in BYPASS mode.
; So type just the DR of TAP4, i.e. 1.
SYStem.CONFIG DRPOST 3.
;
DRPOST
: Add up one DR bit per TAP which
; is in BYPASS mode, i.e. 1. + 1. + 1. = 3.
; This completes the configuration.
Chip
IRPOST
IRPRE
4
1
TAP1
IR
DR
3
1
TAP2
IR
DR
5
1
TAP3
IR
DR
6
1
TAP4
IR
DR
TDI
TDO
DRPOST
DRPRE
IR
: Instruction register length
DR
: Data register length
Chip
: The chip you want to debug
