MC68360EM25VL Freescale Semiconductor, MC68360EM25VL Datasheet - Page 792

• Manufacturer Part Number: MC68360EM25VL
• Description: IC MPU QUICC 25MHZ 240-FQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68360EM25VL

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 240-FQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Applications
9.7.4 Test Pattern Generation
The easiest way to generate the test pattern is to use the QUICC CPU32+ to transfer the
test pattern over its I/O pins using a bit-banging technique.
The test pattern output data is written to the I/O ports, and therefore to the pins, by writing
to the digital output ports (MTCK, MTMS, and MTDI); the result is read back by simply read-
ing the MTDO pin. A data area is created in memory to hold the test pattern. The CPU32+
compares the result on the MTDO pin to the respective expected result in memory.
Figure 9-26 shows an example of the pattern that would be stored in the memory array. The
three leftmost columns are output signals written to the I/O port, and the right column is the
result expected to be read back. Since the clock signal is part of the pattern and not sepa-
rately generated, both clock phases are represented, and thus two entries comprise each
TCK clock cycle.
9-72
TDO
TMS
TCK
TDI
MUX:
IF MM = 1 THEN B
IF MM = 0 THEN A
FROM LAST DEVICE IN SCAN LOOP
A
B
MUX
EN
OUT
Figure 9-25. Signal Routing for Test Bus Master
TO FIRST DEVICE IN SCAN LOOP
Freescale Semiconductor, Inc.
For More Information On This Product,
A
B
MUX
EN
OUT
MC68360 USER’S MANUAL
Go to: www.freescale.com
A
B
MUX
EN
OUT
EN
IN TEST MASTER MODE
I/O FUNCTIONS IF NOT
LATCH
MTDI
MTMS
MTCK
MTDO
MM
QUICC WITHOUT
TAP IN USE