S9S12GA240F0VLH Freescale Semiconductor, S9S12GA240F0VLH Datasheet - Page 337
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S9S12GA240F0VLH
Manufacturer Part Number
S9S12GA240F0VLH
Description
16-bit Microcontrollers - MCU 16BIT 240KB FLASH
Manufacturer
Freescale Semiconductor
Datasheet
1.S9S12G96F0CLL.pdf
(1292 pages)
Specifications of S9S12GA240F0VLH
Rohs
yes
Core
S12
Processor Series
MC9S12G
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
240 KB
Data Ram Size
4 KB
On-chip Adc
Yes
Operating Supply Voltage
3.13 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
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disarmed state0. Transition between any of the states 1 to 3 is not restricted. Each transition updates the
SSF[2:0] flags in DBGSR accordingly to indicate the current state.
Alternatively writing to the TRIG bit in DBGSC1, provides an immediate trigger independent of
comparator matches.
Independent of the state sequencer, each comparator channel can be individually configured to generate an
immediate breakpoint when a match occurs through the use of the BRK bits in the DBGxCTL registers.
Thus it is possible to generate an immediate breakpoint on selected channels, whilst a state sequencer
transition can be initiated by a match on other channels. If a debug session is ended by a match on a channel
the state sequencer transitions through Final State for a clock cycle to state0. This is independent of tracing
and breakpoint activity, thus with tracing and breakpoints disabled, the state sequencer enters state0 and
the debug module is disarmed.
8.4.4.1
On entering Final State a trigger may be issued to the trace buffer according to the trace alignment control
as defined by the TALIGN bit (see
TSOURCE bit in DBGTCR is clear then the trace buffer is disabled and the transition to Final State can
only generate a breakpoint request. In this case or upon completion of a tracing session when tracing is
enabled, the ARM bit in the DBGC1 register is cleared, returning the module to the disarmed state0. If
tracing is enabled a breakpoint request can occur at the end of the tracing session. If neither tracing nor
breakpoints are enabled then when the final state is reached it returns automatically to state0 and the debug
module is disarmed.
8.4.5
The trace buffer is a 64 lines deep by 20-bits wide RAM array. The DBG module stores trace information
in the RAM array in a circular buffer format. The system accesses the RAM array through a register
window (DBGTBH:DBGTBL) using 16-bit wide word accesses. After each complete 20-bit trace buffer
line is read, an internal pointer into the RAM increments so that the next read receives fresh information.
Data is stored in the format shown in
DBGCNT is incremented. Tracing of CPU activity is disabled when the BDM is active. Reading the trace
buffer whilst the DBG is armed returns invalid data and the trace buffer pointer is not incremented.
8.4.5.1
Using the TALIGN bit (see
align the trigger with the end or the beginning of a tracing session.
If end alignment is selected, tracing begins when the ARM bit in DBGC1 is set and State1 is entered; the
transition to Final State signals the end of the tracing session. Tracing with Begin-Trigger starts at the
opcode of the trigger. Using end alignment or when the tracing is initiated by writing to the TRIG bit whilst
configured for begin alignment, tracing starts in the second cycle after the DBGC1 write cycle.
Freescale Semiconductor
Trace Buffer Operation
Final State
Trace Trigger Alignment
Section 8.3.2.3, “Debug Trace Control Register
MC9S12G Family Reference Manual, Rev.1.23
Section 8.3.2.3, “Debug Trace Control Register
Table 8-37
and
Table
8-40. After each store the counter register
(DBGTCR)) it is possible to
S12S Debug Module (S12SDBGV2)
(DBGTCR)”). If the
339
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