S9S12P64J0CFTR Freescale Semiconductor, S9S12P64J0CFTR Datasheet - Page 176
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S9S12P64J0CFTR
Manufacturer Part Number
S9S12P64J0CFTR
Description
16-bit Microcontrollers - MCU 16-bit 64K Flash
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S12P64VQK.pdf
(566 pages)
Specifications of S9S12P64J0CFTR
Rohs
yes
Core
S12
Processor Series
MC9S12P
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
64 KB
Data Ram Size
4 KB
On-chip Adc
Yes
Operating Supply Voltage
3.15 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
QFN-48
Mounting Style
SMD/SMT
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S12S Debug Module (S12SDBGV2)
SZ bits allow the size of access (word or byte) to be considered in the compare. Only comparators A and
B feature SZE and SZ.
The TAG bit in each comparator control register is used to determine the match condition. By setting TAG,
the comparator qualifies a match with the output of opcode tracking logic and a state sequencer transition
occurs when the tagged instruction reaches the CPU execution stage. Whilst tagging the RW, RWE, SZE,
and SZ bits and the comparator data registers are ignored; the comparator address register must be loaded
with the exact opcode address.
If the TAG bit is clear (forced type match) a comparator match is generated when the selected address
appears on the system address bus. If the selected address is an opcode address, the match is generated
when the opcode is fetched from the memory, which precedes the instruction execution by an indefinite
number of cycles due to instruction pipelining. For a comparator match of an opcode at an odd address
when TAG = 0, the corresponding even address must be contained in the comparator register. Thus for an
opcode at odd address (n), the comparator register must contain address (n–1).
Once a successful comparator match has occurred, the condition that caused the original match is not
verified again on subsequent matches. Thus if a particular data value is verified at a given address, this
address may not still contain that data value when a subsequent match occurs.
Match[0, 1, 2] map directly to Comparators [A, B, C] respectively, except in range modes (see 6.3.2.4).
Comparator channel priority rules are described in the priority section (6.4.3.4).
6.4.2.1
With range comparisons disabled, the match condition is an exact equivalence of address bus with the
value stored in the comparator address registers. Further qualification of the type of access (R/W,
word/byte) and databus contents is possible, depending on comparator channel.
6.4.2.1.1
Comparator C offers only address and direction (R/W) comparison. The exact address is compared, thus
with the comparator address register loaded with address (n) a word access of address (n–1) also accesses
(n) but does not cause a match.
6.4.2.1.2
Comparator B offers address, direction (R/W) and access size (word/byte) comparison. If the SZE bit is
set the access size (word or byte) is compared with the SZ bit value such that only the specified size of
176
1. A word access of ADDR[n-1] also accesses ADDR[n] but does not generate a match.
The comparator address register must contain the exact address from the code.
Read and write accesses of ADDR[n]
Condition For Valid Match
Write accesses of ADDR[n]
Read accesses of ADDR[n]
Single Address Comparator Match
Comparator C
Comparator B
Table 6-32. Comparator C Access Considerations
S12P-Family Reference Manual, Rev. 1.13
Comp C Address RWE
ADDR[n]
ADDR[n]
ADDR[n]
(1)
0
1
1
RW
X
0
1
LDAA ADDR[n]
STAA #$BYTE ADDR[n]
STAA #$BYTE ADDR[n]
LDAA #$BYTE ADDR[n]
Freescale Semiconductor
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