Albatron Technology ARM11/Cortex-A8 user manual Adaptive Clocking

bdiGDB for GNU Debugger, BDI2000 (ARM11/Cortex-A8) User Manual 9

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.

Rev. B/C

Target System

ARM

BDI2000

Abatron AG Swiss Made

		20 pin Multi-ICE
1	19	Connector
		1	- Vcc Target
		2	- NC
		3	- TRST
2	20	4	- NC
		5	- TDI
		6	- NC
		7	- TMS
		8	- GROUND
		9	- TCK
		10	- GROUND
		11	- RTCK
		12	- NC
BDI TRGT MODE TARGET A	TARGET B	13	- TDO
		14	- NC
15	1
		15	- RESET
		16	- NC
16	2	17	- NC
		18	- NC
		19	- NC
The green LED «TRGT» marked light up when target is powered up		20	- NC

For TARGET B connector signals see table on next page.

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