S9S08SG16E1CTLR Freescale Semiconductor, S9S08SG16E1CTLR Datasheet - Page 280
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S9S08SG16E1CTLR
Manufacturer Part Number
S9S08SG16E1CTLR
Description
IC MCU 8BIT 16KB FLASH 28TSSOP
Manufacturer
Freescale Semiconductor
Series
HCS08r
Datasheet
1.S9S08SG16E1CTG.pdf
(330 pages)
Specifications of S9S08SG16E1CTLR
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
22
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-TSSOP
Processor Series
S08SG
Core
HCS08
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08SG32, DEMO9S08SG32AUTO, DEMO9S08SG8, DEMO9S08SG8AUTO
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
S9S08SG16E1CTLRTR
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Chapter 17 Development Support
the host must perform ((8 – CNT) – 1) dummy reads of the FIFO to advance it to the first significant entry
in the FIFO.
In most trigger modes, the information stored in the FIFO consists of 16-bit change-of-flow addresses. In
these cases, read DBGFH then DBGFL to get one coherent word of information out of the FIFO. Reading
DBGFL (the low-order byte of the FIFO data port) causes the FIFO to shift so the next word of information
is available at the FIFO data port. In the event-only trigger modes (see
8-bit data information is stored into the FIFO. In these cases, the high-order half of the FIFO (DBGFH) is
not used and data is read out of the FIFO by simply reading DBGFL. Each time DBGFL is read, the FIFO
is shifted so the next data value is available through the FIFO data port at DBGFL.
In trigger modes where the FIFO is storing change-of-flow addresses, there is a delay between CPU
addresses and the input side of the FIFO. Because of this delay, if the trigger event itself is a change-of-flow
address or a change-of-flow address appears during the next two bus cycles after a trigger event starts the
FIFO, it will not be saved into the FIFO. In the case of an end-trace, if the trigger event is a change-of-flow,
it will be saved as the last change-of-flow entry for that debug run.
The FIFO can also be used to generate a profile of executed instruction addresses when the debugger is not
armed. When ARM = 0, reading DBGFL causes the address of the most-recently fetched opcode to be
saved in the FIFO. To use the profiling feature, a host debugger would read addresses out of the FIFO by
reading DBGFH then DBGFL at regular periodic intervals. The first eight values would be discarded
because they correspond to the eight DBGFL reads needed to initially fill the FIFO. Additional periodic
reads of DBGFH and DBGFL return delayed information about executed instructions so the host debugger
can develop a profile of executed instruction addresses.
17.3.3
To minimize the amount of information stored in the FIFO, only information related to instructions that
cause a change to the normal sequential execution of instructions is stored. With knowledge of the source
and object code program stored in the target system, an external debugger system can reconstruct the path
of execution through many instructions from the change-of-flow information stored in the FIFO.
For conditional branch instructions where the branch is taken (branch condition was true), the source
address is stored (the address of the conditional branch opcode). Because BRA and BRN instructions are
not conditional, these events do not cause change-of-flow information to be stored in the FIFO.
Indirect JMP and JSR instructions use the current contents of the H:X index register pair to determine the
destination address, so the debug system stores the run-time destination address for any indirect JMP or
JSR. For interrupts, RTI, or RTS, the destination address is stored in the FIFO as change-of-flow
information.
17.3.4
Tagging is a term that refers to identifying an instruction opcode as it is fetched into the instruction queue,
but not taking any other action until and unless that instruction is actually executed by the CPU. This
distinction is important because any change-of-flow from a jump, branch, subroutine call, or interrupt
causes some instructions that have been fetched into the instruction queue to be thrown away without being
executed.
280
Change-of-Flow Information
Tag vs. Force Breakpoints and Triggers
MC9S08SG32 Data Sheet, Rev. 8
Section 17.3.5, “Trigger
Freescale Semiconductor
Modes”),
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