S9S12P64J0MFT Freescale Semiconductor, S9S12P64J0MFT Datasheet - Page 186
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S9S12P64J0MFT
Manufacturer Part Number
S9S12P64J0MFT
Description
MCU 64K FLASH AUTO 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.S9S12P32J0MFT.pdf
(566 pages)
Specifications of S9S12P64J0MFT
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 ~ 125°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)
Field3 Bits in Compressed Pure PC Modes
Each time that PC[17:6] differs from the previous base PC[17:6], then a new base address is stored. The
base address zero value is the lowest address in the 64 address range
The first line of the trace buffer always gets a base PC address, this applies also on rollover.
6.4.5.5
The data stored in the Trace Buffer can be read provided the DBG module is not armed, is configured for
tracing (TSOURCE bit is set) and the system not secured. When the ARM bit is written to 1 the trace buffer
is locked to prevent reading. The trace buffer can only be unlocked for reading by a single aligned word
write to DBGTB when the module is disarmed.
The Trace Buffer can only be read through the DBGTB register using aligned word reads, any byte or
misaligned reads return 0 and do not cause the trace buffer pointer to increment to the next trace buffer
address. The Trace Buffer data is read out first-in first-out. By reading CNT in DBGCNT the number of
valid lines can be determined. DBGCNT does not decrement as data is read.
Whilst reading an internal pointer is used to determine the next line to be read. After a tracing session, the
pointer points to the oldest data entry, thus if no rollover has occurred, the pointer points to line0, otherwise
it points to the line with the oldest entry. In compressed Pure PC mode on rollover the line with the oldest
data entry may also contain newer data entries in fields 0 and 1. Thus if rollover is indicated by the TBF
bit, the line status must be decoded using the INF bits in field3 of that line. If both INF bits are clear then
the line contains only entries from before the last rollover.
If INF0=1 then field 0 contains post rollover data but fields 1 and 2 contain pre rollover data.
If INF1=1 then fields 0 and 1 contain post rollover data but field 2 contains pre rollover data.
The pointer is initialized by each aligned write to DBGTBH to point to the oldest data again. This enables
an interrupted trace buffer read sequence to be easily restarted from the oldest data entry.
The least significant word of line is read out first. This corresponds to the fields 1 and 0 of
next word read returns field 2 in the least significant bits [3:0] and “0” for bits [15:4].
Reading the Trace Buffer while the DBG module is armed returns invalid data and no shifting of the RAM
pointer occurs.
6.4.5.6
The Trace Buffer contents and DBGCNT bits are not initialized by a system reset. Thus should a system
reset occur, the trace session information from immediately before the reset occurred can be read out and
the number of valid lines in the trace buffer is indicated by DBGCNT. The internal pointer to the current
186
INF1
0
0
1
1
Reading Data from Trace Buffer
Trace Buffer Reset State
INF0
0
1
0
1
Table 6-41. Compressed Pure PC Mode Field 3 Information Bit Encoding
Base PC address TB[17:0] contains a full PC[17:0] value
Trace Buffer[5:0] contain incremental PC relative to base address zero value
Trace Buffer[11:0] contain next 2 incremental PCs relative to base address zero value
Trace Buffer[17:0] contain next 3 incremental PCs relative to base address zero value
S12P-Family Reference Manual, Rev. 1.13
TRACE BUFFER ROW CONTENT
Freescale Semiconductor
Table
6-37. The
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