HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 365

• 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: -

_ _evenaccess
Description Format: _ _evenaccess <type specifier> <variable name>
Description:
Example:
Remarks:
<type specifier> _ _evenaccess <variable name>
Ensures access to an integer-type variable to be done within the size
of the declared variable type.
For the H8/300, 4-byte scalar-type variables are accessed in 2-byte units.
For the H8SX, refer to the remarks below.
#define A (*(volatile unsigned short _ _evenaccess
*)0xff0178)
void test(void)
{
}
When _ _evenaccess is not specified
(1-byte memory access by BCLR.B)
_test:
MOV.L
BCLR.B #H’5,@ER0
RTS
A &= ~0x2000 ;
If a 2-byte counter register is accessed in1-byte unit, the 1 byte that is
not accessed may have an incorrect value. In this case, specify
_ _evenaccess to the counter register to access it with the correct size.
When the CPU is H8SX, _ _evenaccess can be specified for all types
and the member including bit fields of structures,
unions, and classes. When _ _evenaccess is specified for structures,
unions, and classes, access is the same as that when specified for each
member.
The double type cannot be accessed in 8-byte units.
When the little-endian space is supported by
H8SX, access a datum in the size of its type using _ _evenaccess.
In H8SX, an error will occur if the initial value is specified for the
static variable with _ _evenaccess declaration in order to avoid placing
the initial value of big endian in the little-endian space.
#H’FF0178,ER0
When _ _evenaccess is specified
(2-byte memory access by MOV.W)
_test:
MOV.W
BCLR.B #H’5,R0H
MOV.W
RTS
@H’FF0178:24,R0
R0,@H’FF0178:24
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