Freescale Semiconductor NXP CodeWarrior USB TAP User Manual page 34

BDM Connector Information
Table C.1 CodeWarrior USB TAP Emulator for BDM Signal Directions ( continued )
BDM
Pin
20
21
22
23
24
25
26
1
4.7Ohm pull-up to buffered TGT PWR.
2
100KOhm pull-up to buffered TGT PWR.
Table C.2 CodeWarrior USB TAP for BDM Signal Recommendations and Requirements
BDM
Pin
1
2
3
4
5
6
34
Signal Signal
Mnemonic Direction
GND - n/a -
Reserved - n/a -
Reserved - n/a -
GND - n/a -
PSTCLK From target
Core Voltage - n/a -
TEA From USB TAP
connector
Signal Requirement
Mnemonic
Reserved Need not be wired to the target. The USB TAP does not
currently use this signal.
BKPT Must be wired to the target.
GND Must be wired to the target. GND is connected directly the
USB TAP ground inside the USB TAP.
DSCLK DSCLK must be connected to the target's processor. It is
driven by the USB TAP as an output with up to 50mA. This
signal is the clock for the BDM interface. It is good design
practice to keep the trace length short and isolate the trace
from other signals. If the trace must be long, then termination
may be needed.
GND Must be wired to the target. GND is connected directly the
USB TAP ground inside the USB TAP.
Reserved Need not be wired to the target. The USB TAP does not
currently use this signal.
Description
30pF load
2
50mA driver
USB TAP Users Guide