SCANSTA101SMSLASHNOPB datasheet(19/42 Pages) TI2

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SCANSTA101

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SNLS057J – MAY 2002 – REVISED APRIL 2013

Structure Control registers.

6. If the Pre-shift TCK_SM Count is not zero, then enable TCK_SM and drive TMS_SM using the first seven

bits of the macro until the Pre-shift TCK_SM Count is zero. During pre-shift, TDO_SM will be driven with its

previous value.

7. If the macro type is State then,

(a) If the Macro Structure Bit 7 is enabled, set TMS_SM to the bit 7 value of the macro structure and drive

TDO_SM with its previous value.

(b) If the Macro Structure Bit 8 is enabled, set TMS_SM to the bit 8 value of the macro structure and drive

TDO_SM with it's previous value and then go to Step 10.

is being used, return to the Idle state.

8. If the macro type is BIST then,

(a) If the Macro Structure Bit 7 is enabled, set the count length, set TMS_SM to the bit 7 value of the macro

structure and drive TDO_SM with the default value (Setup register bit 6) until the count length is zero.

(b) If the Macro Structure Bit 8 is enabled, set TMS_SM to the bit 8 value of the macro structure and drive

TDO_SM with the default value (Setup register bit 6) and then go to Step 10.

is being used, return to the Idle state.

9. If the macro type is Shift or Shift with Capture then,

(a) If the macro type is Shift with Capture, enable TDI capture.

(b) If the Sync Bit Support Enable bit is set, fetch sync bit count, set the count length, set TMS_SM to the

loop bit and drive the TDO_SM high until sync bit count is zero.

while TMS_SM remains set to the loop bit. Repeat for each level of hierarchy.

(d) If the Use Data/Instruction Header is enabled, fetch the header length and data, set the count length, and

drive the TDO_SM with header data until the header length is zero and while TMS_SM remains set to

the loop bit.

(e) If the Compare or Mask/Compare is set, enable the comparator.

(f) Set the vector count length, and drive the TDO_SM with vector data until the count length is one and

while TMS_SM remains set to the loop bit. In the LotF mode if the count length is not zero and the TDO

buffer is empty, then gate TCK_SM until more data are available in the TDO buffer. When TCK_SM is

disabled TMS_SM and TDO_SM will be driven with their previous values.

(g) If the Use Data/Instruction Trailer is enabled, fetch the trailer length and data, set the count length, and

drive TDO_SM with trailer data until the trailer length is one and while TMS_SM remains set to the loop

bit.

(h) If the ScanBridge Support Initiate/Release bit is set:

(a) If the TAP tracker is in the Shift-IR state and the number of levels of hierarchy is greater than one,

set the count length to eight, and drive TDO_SM with post-shift pad bits (all high) until the count

length is zero for each level of hierarchy and while TMS_SM remains set to the loop bit.

(b) If the TAP tracker is in the Shift-DR state and the number of levels of hierarchy is greater than one,

drive TDO_SM with a post-shift pad bit (high) for each level of hierarchy and while TMS_SM remains

set to the loop bit.

Shift-IR state, set the count length to eight, and drive TDO_SM with post-shift pad bits (all high) until

the count length is one and while TMS_SM remains set to the loop bit.

(i) If the Sync Bit Support Enable is set, fetch sync bit count, set the count length, and drive the TDO_SM

high until sync bit count is one and while TMS_SM remains set to the loop bit.

(j) Set TMS_SM to bit 8 of the TMS_SM Macro Structure sequence and drive TDO_SM with the final vector

bit or trailer bit or post-shift pad bit or sync bit. After shifting out the final vector bit, disable the

comparator and register the comparison results.

10. If the post-shift TCK_SM Count is not zero, then enable TCK_SM and drive TMS_SM using the last seven

bits of the macro until the post-shift TCK_SM Count is zero.

11. If the Sequencer is being used,

(a) Decrement the sequence repeat count and return to Step 3C if the Compare or Mask/Compare is

enabled and the results of compare is a fail.

(b) Decrement the vector repeat count and return to Step 3E if the if the Compare or Mask/Compare is

enabled and the results of compare is a pass.

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