Figure 1039.Cpa State Entry From Bpa State With Continued Online Operation - STMicroelectronics SPC572L series Reference Manual

RM0400
60.7.5.3 Control Process Active (CPA) Function
While using the Advanced Protocol, all TAP.7 configuration changes occur within the CPA
state. All online and offline transitions also occur while in the CPA state. When entering the
CPA state from the BPA or SPA state, the CPA state checks for the use of supported
features affecting the Advanced Protocol. The CPA state is exited when the enabled
features affecting the Advanced Protocol are supported.
Figure 1039. CPA State Entry from BPA State with Continued Online Operation
An SP preceding a CP does not advance the TAPC state machine state. This SP performs
housekeeping functions that assure the contents of the SP preceding this SP have been
IEEE 1149.7 Compact JTAG Test Access Port Controller (CJTAG)
Exit1-DR
S
Pause-DR
t
a
Exit2-DR
n
Shift-DR
d
a
Shift-DR
r
d
Shift-DR
Exit1-DR
P
r
Pause-DR
o
Pause-DR t
o
Pause-DR
c
o
Exit2-DR
l
Update-DR
Run- CP
Test/Idle
SP
Select-DR SP
Select-IR SP
Capture-IR SP
Shift-IR SP
Legend: = Scan Packet causing TAP controller state
SP
= Change packet controlling offline / online
CP
DocID027809 Rev 4
BPA State
0
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CPA State CP Example
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0
SPA State
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