HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 286

• 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: -

9.4
bear in mind during development of a program from compiling through debugging, are described.
9.4.1
(1) Functions taking float type parameters
(2) Expressions for which order of evaluation is not specified by the C/C++ language
(3) Code which may be deleted through optimization
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In this section, important information on writing program code for the compiler, and matters to
Functions which declare a float type parameter should always be given a prototype declaration,
or else the float type should be changed to the double type in the parameter declaration. If a
function which takes a float type parameter but does not have a prototype declaration is called,
correct operation is not guaranteed.
Example:
The function f takes a float type parameter. Here a prototype declaration like that in [1] should
always be used.
If an expression is used for which the order of evaluation is not stipulated by the C/C++
language, and the result of the expression changes depending on the order of evaluation, then
correct operation is not guaranteed.
Example:
a[i]=a[++i];
sub(++i, i);
When the same variable is referenced continuously, or an expression whose result is not used
is written, such code may be deleted as redundant by the compiler as part of optimization. In
order to ensure constant access, the volatile keyword should be used in the declaration.
Important Information on Program Creation
Important Information on Program Coding
void f(float); ------[1]
void g(
{
}
void f(float x)
{
}
float a;
:
:
f(a);
The value of i on the left-hand side changes depending on whether
the assignment expression on the right is evaluated first or last.
The value of i of the second parameter changes depending on
whether the first parameter of the function is evaluated first or last.