TSC21020F Datasheet, PDF (46/50 Pages) ATMEL Corporation – Rad. Hard 32/40-bit IEEE Floating Point DSP

The tip of the pins must be at least 0.10 inch higher than the tallest component under the
probe to allow clearance for the bottom of the probe. Pin strip headers are available
from vendors such as 3M, McKenzie, and Samtec.
The length of the traces between the EZ-ICE probe connector and the TSC21020F test
access port pins should be less than 1 inch. Note that the EZ-ICE probe adds two TTL
loads to the CLKIN pin of the TSC21020F.
The BMTS, BTCK, BTRST, and BTDI signals are provided so that the test access port
can also be used for board-level testing. When the connector is not being used for emu-
lation, place jumpers between the BXXX pins and the XXX pins as shown in Figure 20. If
you are not going to use the test access port for board test, tie BTRST to GND and tie or
pull up BTCK to VDD. The TRST pin must be asserted (pulsed low) after power up
(through BTRST on the connector) or held low for proper operation of the TSC21020F.
46 TSC21020F
4153H–AERO–04/07