mc9s08dz32amlfr Freescale Semiconductor, Inc, mc9s08dz32amlfr Datasheet - Page 409

• Manufacturer Part Number: mc9s08dz32amlfr
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

18.3.3.16 Debug Count Status Register (DBGCNT)
1
Freescale Semiconductor
end-run
Module Base + 0x000F
end-run
or non-
In the case of an end-trace to reset where DBGEN=1 and BEGIN=0, the CNT[3:0] bits do not change after reset.
Reset
Field
POR
CNT
3–0
W
R
1
FIFO Valid Count Bits — The CNT bits indicate the amount of valid data stored in the FIFO.
the correlation between the CNT bits and the amount of valid data in FIFO. The CNT will stop after a count to
eight even if more data is being stored in the FIFO. The CNT bits are cleared when the DBG module is armed,
and the count is incremented each time a new word is captured into the FIFO. The host development system is
responsible for checking the value in CNT[3:0] and reading the correct number of words from the FIFO because
the count does not decrement as data is read out of the FIFO at the end of a trace run.
0
0
0
7
= Unimplemented or Reserved
Figure 18-17. Debug Count Status Register (DBGCNT)
0
0
0
6
CNT Value
Table 18-19. DBGS Field Descriptions
MC9S08DZ128 Series Data Sheet, Rev. 1
0000
0001
0010
0011
0100
0101
0110
0111
1000
0
0
0
5
Table 18-20. CNT Bits
0
0
0
4
Description
No data valid
2 words valid
3 words valid
4 words valid
5 words valid
6 words valid
7 words valid
8 words valid
1 word valid
Meaning
U
0
3
Chapter 18 Debug Module (S08DBGV3) (128K)
U
0
2
CNT
U
0
1
Table 18-20
U
0
0
shows
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