MC9S12P64CFT Freescale Semiconductor, MC9S12P64CFT Datasheet - Page 182
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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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S12S Debug Module (S12SDBGV2)
6.4.5.2.1
In Normal Mode, change of flow (COF) program counter (PC) addresses are stored.
COF addresses are defined as follows:
LBRA, BRA, BSR, BGND as well as non-indexed JMP, JSR, and CALL instructions are not classified as
change of flow and are not stored in the trace buffer.
Stored information includes the full 18-bit address bus and information bits, which contains a
source/destination bit to indicate whether the stored address was a source address or destination address.
MARK1
MARK2
SUB_1
ADDR1
IRQ_ISR LDAB
MARK1
IRQ_ISR LDAB
SUB_1
ADDR1
182
•
•
•
•
Source address of taken conditional branches (long, short, bit-conditional, and loop primitives)
Destination address of indexed JMP, JSR, and CALL instruction
Destination address of RTI, RTS, and RTC instructions
Vector address of interrupts, except for BDM vectors
LDX
JMP
NOP
BRN
NOP
DBNE
STAB
RTI
LDX
JMP
STAB
RTI
BRN
NOP
DBNE
Normal Mode
When a COF instruction with destination address is executed, the
destination address is stored to the trace buffer on instruction completion,
indicating the COF has taken place. If an interrupt occurs simultaneously
then the next instruction carried out is actually from the interrupt service
routine. The instruction at the destination address of the original program
flow gets executed after the interrupt service routine.
In the following example an IRQ interrupt occurs during execution of the
indexed JMP at address MARK1. The BRN at the destination (SUB_1) is
not executed until after the IRQ service routine but the destination address
is entered into the trace buffer to indicate that the indexed JMP COF has
taken place.
The execution flow taking into account the IRQ is as follows
#SUB_1
0,X
*
A,PART5
#$F0
VAR_C1
#SUB_1
0,X
#$F0
VAR_C1
*
A,PART5
S12P-Family Reference Manual, Rev. 1.13
; IRQ interrupt occurs during execution of this
;
; JMP Destination address TRACE BUFFER ENTRY 1
; RTI Destination address TRACE BUFFER ENTRY 3
;
; Source address TRACE BUFFER ENTRY 4
; IRQ Vector $FFF2 = TRACE BUFFER ENTRY 2
;
;
;
;
;
;
NOTE
Freescale Semiconductor
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