HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 262

• 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: -

248
Below are specific examples of rules for guaranteeing register values, in the case of the
H8S/2600 advanced mode.
(a) Calling an assembly program subroutine from a C/C++ program
(b) Calling a C program subroutine from an assembly program
#ifdef _ _cplusplus
extern “C”
#endif
void sub(void);
void f(void)
{
}
_sub:
Assembly program (called function)
C/C++ program (calling function)
C program (called function)
Assembly program (calling function)
void sub(void)
{
}
sub();
…
.IMPORT
.SECTION P,CODE,ALIGN=2
MOV.L
MOV.L
JSR
RTS
.END
.EXPORT
.SECTION P,CODE,ALIGN=2
STM.L
SUB.L
ADD.L
LDM.L
RTS
.END
:
:
ER1,@(4,SP)
ER0,ER6
@_sub
(ER4-ER6),@-SP
#10,SP
#10,SP
@SP+,(ER4-ER6)
_sub
:
_sub
Contents of registers to be used within
the function are saved by the callee
Function body (ER0, ER1 can be used
without saving)
Saved register contents restored
If there are valid values in registers
ER0, ER1, they are saved by the
caller to unused registers or to the
stack
Function name referenced with _
prepended