HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 214

• Manufacturer Part Number: HD64F38024DV
• Description: IC H8/SLP MCU FLASH 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD64F38024DV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: LCD, PWM, WDT
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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(b) Calculation of stack area size
The maximum stack area size used by C/C++ programs and standard libraries can be
calculated by specifying the stack option of the optimizing linkage editor to output a stack
information file, and using the stack usage analysis tool. For details of use of the stack
usage analysis tool, refer to section 6, Operating Stack Analysis Tool.
The stack analysis tool can calculate the stack usage, if label is specified by .STACK
directive. But it cannot calculate the stack area used by an assembly program, which was
assembled by the assembler unable to output to a stack information file. Instead, the stack
usage of an assembly program should be computed by the method outlined below for
calculating the stack usage of a C/C++ program, and the result should be added to the stack
usage calculated by the stack usage analysis tool.
Method for Calculating Stack Usage by C/C++ Program: Stack area is allocated for use
by a C/C++ program each time a function is called, and is released when the function
returns. In order to calculate the size of the stack area used, first the amount of stack space
used by each function is computed, and then the calling relations of functions are used to
calculate the actual stack space use.
The stack area used by each function can be found from the symbol allocation information
(total frame size) of the compile list.
The stack area used by each function can be found from the symbol allocation information
(total frame size) of the compile list.
The stack area used by the function is the total frame size of 0x12, that is, 18 bytes.
An example of function calling relationships and stack use by each function appears in
figure 9.5. Here, the size of the stack used when function g is called via function f is
calculated in table 9.2.
****** STACK FRAME INFORMATION ******
FILE NAME: test.c
Function (File test.c
Paramater Area Size
Linkage Area Size
Local Variable Size
Temporary Size
Register Save Area Size
Total Frame Size
Optimize Option Specified :
, Line
: 0x00000008 Byte(s)
: 0x00000004 Byte(s)
: 0x00000002 Byte(s)
: 0x00000000 Byte(s)
: 0x00000004 Byte(s)
: 0x00000012 Byte(s)
No Allocation Information Available
2):main