MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
25-1
Chapter 25
IEEE 1149.1-Compliant Interface (JTAG)
The chip design includes user-accessible test logic that is compatible with the IEEE 1149.1-1994 Standard
Test Access Port and Boundary Scan Architecture. The implementation supports circuit-board test
strategies based on this standard. An overview of the pins requirement on JTAG is shown in
.
Figure 25-1. Pin Requirement on JTAG
25.1
IEEE 1149.1 Test Access Port
The MPC561/MPC563 provides a dedicated user-accessible test access port (TAP) that is compatible with
the IEEE 1149.1 Standard Test Access Port and Boundary Scan Architecture in all but two areas listed
below. Problems associated with testing high density circuit boards have led to development of this
proposed standard under the sponsorship of the Test Technology Committee of IEEE and the Joint Test
Action Group (JTAG). The MPC561/MPC563 implementation supports circuit-board test strategies based
on this standard.
IEEE1149.1 Compatibility Exceptions:
•
The MPC561/MPC563 enters JTAG mode by going through a standard device reset sequence with
the JCOMP signal asserted high during PORESET negation. Once JTAG has been entered, the
MPC561/MPC563 remains in JTAG mode until another reset sequence is applied to exit JTAG
mode, or the device is powered down.
•
The JTAG output port, TDO, is configured with a weak pull-up until reset negates or the driver is
disabled.
T
A
P
TDI
TCK
TMS
JCOMP
/
RSTI
TDO
MPC561/MPC563
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TRST
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...