MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 757

• 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

22.3 Operating Frequency
22.4 TAP Controller
MPC555
USER’S MANUAL
Signal
Name
TRST
TDO
TMS
TCK
TDI
The TCK frequency must be between 5 MHz and 10 MHz. This pin is internally driven
to a low value when disconnected.
TRST is used to reset the TAP controller asynchronously. The TRST pin ensures that
the JTAG logic does not interfere with the normal operation of the chip. This pin is op-
tional in the JTAG specification.
The TAP controller changes state either on the rising edge of TCK or when TRST is
asserted.
The TDO signal remains in a high-impedance state except during the Shift-DR or Shift-
IR controller states. During these controller states, TDO is updated on the falling edge
of TCK.
The TAP controller states are designed to meet the IEEE 1149.1 standard. Refer to
Figure
/
Output (I/O)
MPC556
22-3.
Output
Input/
Input
Input
Input
Input
Table 22-1 JTAG Interface Pin Descriptions
Pull-Down Provided
Internal Pull-Up/
IEEE 1149.1-COMPLIANT INTERFACE (JTAG)
Pull-down
Pull-up
Pull-up
Pull-up
None
Rev. 15 October 2000
Test data input pin. Sampled on the rising edge of TCK. Has a
pull-up resistor.
Test data output pin. Actively driven during the Shift-IR and Shift-
DR controller states. Changes on the falling edge of TCK. Can
be placed in high-impedance state.
Test mode select pin. Sampled on the rising edge of TCK to se-
quence the test controller’s state machine. Has a pull-up resis-
tor.
Test clock input to synchronize the test logic. Has a pull-down re-
sistor.
TAP controller asynchronous reset. Provides initialization of the
TAP controller and other logic as required by the standard. Has
a pull-up resistor.
Description
MOTOROLA
22-3