HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 259

• 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: -

(1) Method for referencing assembly program external names in C/C++ programs
(2) Method for referencing C/C++ program external names (variables and C functions) from
(3) Method for referencing C++ program external names (functions) from assembly programs
In assembly programs, the .EXPORT directive is used to declare external symbol names
(preceded by an underscore (_)).
In C/C++ programs, symbol names (not preceded by an underscore) are declared using the
extern keyword.
Assembly program (defines the name)
assembly programs
A C/C++ program can define external variable names (without an underscore (_)).
In an assembly program, the .IMPORT directive is used to reference an external name
(preceded by an underscore).
C/C++ program (defines the name)
By declaring functions to be referenced from an assembly program using the extern "C"
keyword, the function can be referenced using the same rules as in (2) above. However,
functions declared using extern "C" cannot be overloaded.
C++ program (defines the name)
extern "C"
int f(int a)
{
}
char a,b;
_a: .DATA.W
_b: .DATA.W
…
.EXPORT
.SECTION D,DATA,ALIGN=2
.END
1
1
_a,_b
.IMPORT
.SECTION P,CODE,ALIGN=2
JSR
.END
C/C++ program (references the name)
Assembly program (references the name)
Assembly program (references the name)
:
:
.IMPORT
.SECTION P,CODE,ALIGN=2
MOV.B
MOV.B
RTS
.END
extern int a,b;
f()
{
}
_f
@_f
a+=b;
_a,_b
@_a,R5L
R5L,@_b
245