mcf52221 Freescale Semiconductor, Inc, mcf52221 Datasheet - Page 25

• Manufacturer Part Number: mcf52221
• Description: Mcf52223 Coldfire Microcontroller 32-bits Microcontrollers With Usb And Zigbee
• Manufacturer: Freescale Semiconductor, Inc

1.16
Table
Freescale Semiconductor
Processor Status Clock
All Processor Status
Development Serial
Development Serial
contains a list of EzPort external signals.
Processor Status
Signal Name
Debug Data
EzPort Signal Descriptions
Outputs
Outputs
Output
Input
EzPort Serial Data Out
EzPort Serial Data In
EzPort Chip Select
Signal Name
EzPort Clock
Abbreviation
DDATA[3:0]
PSTCLK
PST[3:0]
ALLPST
DSO
DSI
Table 15. Debug Support Signals (continued)
MCF52223 ColdFire Microcontroller, Rev. 2
Table 16. EzPort Signal Descriptions
Abbreviation
Development Serial Input - Internally synchronized input that provides
data input for the serial communication port to the debug module, after
the DSCLK has been seen as high (logic 1).
Development Serial Output - Provides serial output communication for
debug module responses. DSO is registered internally. The output is
delayed from the validation of DSCLK high.
Display captured processor data and breakpoint status. The CLKOUT
signal can be used by the development system to know when to
sample DDATA[3:0].
Processor Status Clock - Delayed version of the processor clock. Its
rising edge appears in the center of valid PST and DDATA output.
PSTCLK indicates when the development system should sample PST
and DDATA values.
If real-time trace is not used, setting CSR[PCD] keeps PSTCLK, and
PST and DDATA outputs from toggling without disabling triggers.
Non-quiescent operation can be reenabled by clearing CSR[PCD],
although the external development systems must resynchronize with
the PST and DDATA outputs.
PSTCLK starts clocking only when the first non-zero PST value (0xC,
0xD, or 0xF) occurs during system reset exception processing.
Indicate core status. Debug mode timing is synchronous with the
processor clock; status is unrelated to the current bus transfer. The
CLKOUT signal can be used by the development system to know
when to sample PST[3:0].
Logical AND of PST[3:0]. The CLKOUT signal can be used by the
development system to know when to sample ALLPST.
EZPCK
EZPCS
EZPD
EZPQ
Shift clock for EzPort transfers.
Chip select for signalling the start and end of
serial transfers.
EZPD is sampled on the rising edge of
EZPCK.
EZPQ transitions on the falling edge of
EZPCK.
Function
Function
MCF52223 Family Configurations
I/O
O
I
I
I
I/O
O
O
O
O
O
I
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