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for GNU Debugger, BDI2000 (ARM11/Cortex-A8) User Manual 9
© Copyright 1997-2007 by ABATRON AG Switzerland V 1.04
2.1.2 Adaptive Clocking
Adaptive clocking is a feature which ensures that the BDI2000 never loses synchronization with the
target device, whatever the target clock speed is. To achieve this, BDI2000 uses two signals TCK and
RTCK. When adaptive clocking is selected, BDI2000 issues a TCK signal and waits for the Returned
TCK (RTCK) to come back. BDI2000 does not progress to the next TCK until RTCK is received. For
more information about adaptive clocking see ARM documentation.
Note
:
Adaptive clocking is only supported with BDI2000 Rev.B/C and a special target cable. This special
cable can be ordered separately from Abatron.
For TARGET B connector signals see table on next page.
BDI2000
AA
AA
bb
bb
aa
aa
tt
tt
rr
rr
oo
oo
nn
nn
AA
AA
GG
GG
SS
SS
ww
ww
ii
ii
ss
ss
ss
ss
MM
MM
aa
aa
dd
dd
ee
ee
Target System
ARM
The green LED «TRGT» marked light up when target is powered up
Rev. B/C
1 - Vcc Target
2 - NC
3 - TRST
4 - NC
5 - TDI
6 - NC
7 - TMS
8 - GROUND
9 - TCK
10 - GROUND
11 - RTCK
12 - NC
13 - TDO
14 - NC
15 - RESET
16 - NC
17 - NC
18 - NC
19 - NC
20 - NC
20 pin Multi-ICE
Connector
1
19
20
2
BDI TRGT MODE TARGET A TARGET B
15 1
16
2