AM1707_1008 Datasheet, PDF (187/199 Pages) Texas Instruments – ARM Microprocessor

AM1707
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SPRS637A – FEBRUARY 2010 – REVISED APRIL 2010
– Parameter : The bit length of the command is '8'.
– Parameter : The send data value is '0x00000089'.
– 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'.
• 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-dr'.
– Parameter : The JTAG destination state is 'pause-dr'.
– Parameter : The bit length of the command is '32'.
– Parameter : The send data value is '0xa3302108'.
– Parameter : The actual receive data is 'discarded'.
• Function : Do a send-only all-ones JTAG IR/DR scan.
– Parameter : The JTAG shift state is 'shift-ir'.
– Parameter : The JTAG destination state is 'run-test/idle'.
– Parameter : The bit length of the command is '6'.
– Parameter : The send data value is 'all-ones'.
– Parameter : The actual receive data is 'discarded'.
• Function : Wait for a minimum number of TCLK pulses.
– Parameter : The count of TCLK pulses is '10'.
• Function : Update the JTAG preamble and post-amble counts.
– Parameter : The IR pre-amble count is '0'.
– Parameter : The IR post-amble count is '6 + 4'.
– Parameter : The DR pre-amble count is '0'.
– Parameter : The DR post-amble count is '1 + 1'.
– Parameter : The IR main count is '4'.
– Parameter : The DR main count is '1'.
6.31.4 JTAG 1149.1 Boundary Scan Considerations
To use boundary scan, the following sequence should be followed:
• Execute a valid reset sequence and exit reset
• Wait at least 6000 OSCIN clock cycles
• Enter boundary scan mode using the JTAG pins
No specific value is required on the EMU0 pin for boundary scan testing. If TRST is not driven by the
boundary scan tool or tester, TRST should be externally pulled high during boundary scan testing.
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Peripheral Information and Electrical Specifications 187
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