MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 755

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

22.1 JTAG Interface Block Diagram
MPC555 / MPC556
USER’S MANUAL
The MPC555 / MPC556 includes dedicated user-accessible test logic that is fully com-
patible with the IEEE 1149.1-1990 Standard Test Access Port and Boundary Scan Ar-
chitecture. Problems associated with testing high-density circuit boards have led to
development of this standard under the sponsorship of the Test Technology Commit-
tee of IEEE and the Joint Test Action Group (JTAG). The MPC555 / MPC556 supports
circuit-board test strategies based on this standard.
This section is intended to be used with the supporting IEEE 1149.1-1990 standard.
The scope of this description includes those items required by the standard to be de-
fined and, in certain cases, provides additional information specific to the implementa-
tion. For internal details and applications of the standard, refer to the IEEE 1149.1-
1990 document.
An overview of the JTAG pins on the MPC555 / MPC556 is shown in
Boundary scan cells (BSC) are placed at the digital boundary of the chip (normally the
package pins). The boundary scan cells are chained together to form a boundary scan
register (BSR). The data is serially shifted in through the serial port (TDI) and serially
shifted out through the output port (TDO).
A block diagram of the MPC555 / MPC556 implementation of the IEEE 1149.1-1990
test logic is shown in
IEEE 1149.1-COMPLIANT INTERFACE (JTAG)
JCOMP
IEEE 1149.1-COMPLIANT INTERFACE (JTAG)
Figure
TMS
TDO
TCK
TDI
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Figure 22-1 JTAG Pins
22-2.
Rev. 15 October 2000
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SECTION 22
MPC555 / MPC556
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TRST
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Figure
MOTOROLA
22-1.
22-1