AM1707 datasheet(185/198 Pages) TI

185 / 198 page

TDO

Router

TDI

Steps

CLK

TMS

Router

ARM926EJ-S/ETM

AM1707

www.ti.com

SPRS637A – FEBRUARY 2010 – REVISED APRIL 2010

Figure 6-71. Adding ARM926EJ-S to the scan chain

Pre-amble: The device whose data reaches the emulator first is listed first in the board configuration file.

This device is a pre-amble for all the other devices. This device has the lowest device ID.

Post-amble: The device whose data reaches the emulator last is listed last in the board configuration file.

This device is a post-amble for all the other devices. This device has the highest device ID.

•

Function : Update the JTAG preamble and post-amble counts.

–

Parameter : The IR pre-amble count is '0'.

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Parameter : The IR post-amble count is '0'.

–

Parameter : The DR pre-amble count is '0'.

–

Parameter : The DR post-amble count is '0'.

–

Parameter : The IR main count is '6'.

–

Parameter : The DR main count is '1'.

•

Function : Do a send-only JTAG IR/DR scan.

–

Parameter : The route to JTAG shift state is 'shortest transition'.

–

Parameter : The JTAG shift state is 'shift-ir'.

–

Parameter : The JTAG destination state is 'pause-ir'.

–

Parameter : The bit length of the command is '6'.

–

Parameter : The send data value is '0x00000007'.

–

Parameter : The actual receive data is 'discarded'.

•

Function : Do a send-only JTAG IR/DR scan.

–

Parameter : The route to JTAG shift state is 'shortest transition'.

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Parameter : The JTAG shift state is 'shift-dr'.

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Parameter : The JTAG destination state is 'pause-dr'.

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Parameter : The bit length of the command is '8'.

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Parameter : The send data value is '0x00000089'.

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Parameter : The actual receive data is 'discarded'.

•

Function : Do a send-only JTAG IR/DR scan.

–

Parameter : The route to JTAG shift state is 'shortest transition'.

–

Parameter : The JTAG shift state is 'shift-ir'.

–

Parameter : The JTAG destination state is 'pause-ir'.

–

Parameter : The bit length of the command is '6'.

–

Parameter : The send data value is '0x00000002'.

–

Parameter : The actual receive data is 'discarded'.

•

Function : Embed the port address in next command.

–

Parameter : The port address field is '0x0f000000'.

–

Parameter : The port address value is '3'.

Peripheral Information and Electrical Specifications

185

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