Freescale Semiconductor NXP CodeWarrior USB TAP, User Manual, Page: 28 / 54

DPI Connector Information
28 USB TAP Users Guide
1
4.7KOhm pull-up to buffered TGT PWR.
Table B.1 CodeWarrior USB TAP Emulator for DPI Signal Directions
DPI
Pin Signal
Mnemonic Signal
Direction Description
1 VLSO/FRZ From target
30pF load
1
2 SRST Bi-directional Open-drain. 100Ohm to ground when
asserted by USB TAP, 35pF load
when not asserted
1
3 GND - n/a -
4 DSCK From USB TAP
connector 50mA driver
5 GND - n/a -
6 VFLS1/FRZ From target
35pF load
1
7 HRST Bi-directional Open-drain. 100Ohm to ground when
asserted by USB TAP, 35pF load
when not asserted
1
8 DSDI From USB TAP
connector 50mA driver
9 VDD From target 2MOhm pull-down, plus 0.01uF load
10 DSDO From target 30pF load
Table B.2 CodeWarrior USB TAP for DPI Signal Recommendations and Requirements
DPI
Pin Signal
Mnemonic Requirement
1 VLSO/FRZ VFLS0/FRZ is not needed for emulation.
2 SRST Must be wired to the target. During reset, the USB TAP drives
SRST to ground through a 100Ohm resistor.
3 GND Must be wired to the target. GND is connected directly to the
USB TAP ground inside the USB TAP.
U SB_TA P.book Page 28 Thursday, N ovem ber 10, 2005 2:27 PM