MC9S12P64CFT Freescale Semiconductor, MC9S12P64CFT Datasheet - Page 187
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MC9S12P64CFT
Manufacturer Part Number
MC9S12P64CFT
Description
MCU 16BIT 64K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.S9S12P32J0MFT.pdf
(566 pages)
Specifications of MC9S12P64CFT
Core Processor
HCS12
Core Size
16-Bit
Speed
32MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
34
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.72 V ~ 5.5 V
Data Converters
A/D 10x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN Exposed Pad
Processor Series
S12P
Core
HCS12
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
KIT33812ECUEVME, DEMO9S12PFAME
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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trace buffer address is initialized by unlocking the trace buffer and points to the oldest valid data even if a
reset occurred during the tracing session. To read the trace buffer after a reset, TSOURCE must be set,
otherwise the trace buffer reads as all zeroes. Generally debugging occurrences of system resets is best
handled using end trigger alignment since the reset may occur before the trace trigger, which in the begin
trigger alignment case means no information would be stored in the trace buffer.
The Trace Buffer contents and DBGCNT bits are undefined following a POR.
6.4.6
A tag follows program information as it advances through the instruction queue. When a tagged instruction
reaches the head of the queue a tag hit occurs and can initiate a state sequencer transition.
Each comparator control register features a TAG bit, which controls whether the comparator match causes
a state sequencer transition immediately or tags the opcode at the matched address. If a comparator is
enabled for tagged comparisons, the address stored in the comparator match address registers must be an
opcode address.
Using Begin trigger together with tagging, if the tagged instruction is about to be executed then the
transition to the next state sequencer state occurs. If the transition is to the Final State, tracing is started.
Only upon completion of the tracing session can a breakpoint be generated. Using End alignment, when
the tagged instruction is about to be executed and the next transition is to Final State then a breakpoint is
generated immediately, before the tagged instruction is carried out.
R/W monitoring, access size (SZ) monitoring and data bus monitoring are not useful if tagging is selected,
since the tag is attached to the opcode at the matched address and is not dependent on the data bus nor on
the type of access. Thus these bits are ignored if tagging is selected.
When configured for range comparisons and tagging, the ranges are accurate only to word boundaries.
Tagging is disabled when the BDM becomes active.
6.4.7
It is possible to generate breakpoints from channel transitions to final state or using software to write to
the TRIG bit in the DBGC1 register.
6.4.7.1
Breakpoints can be generated when the state sequencer transitions to the Final State. If configured for
tagging, then the breakpoint is generated when the tagged opcode reaches the execution stage of the
instruction queue.
Freescale Semiconductor
Breakpoints
Tagging
Breakpoints From Comparator Channels
An external pin RESET that occurs simultaneous to a trace buffer entry can,
in very seldom cases, lead to either that entry being corrupted or the first
entry of the session being corrupted. In such cases the other contents of the
trace buffer still contain valid tracing information. The case occurs when the
reset assertion coincides with the trace buffer entry clock edge.
S12P-Family Reference Manual, Rev. 1.13
NOTE
S12S Debug Module (S12SDBGV2)
187
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