HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 407

• 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: -

(b) FILE structure and file pointer
(c) Functions and macros
(d) EOF
The buffer, and other information, required for the stream input/output described above are
stored in a single structure, defined by the name FILE in the <stdio.h> standard include
file.
In stream input/output, all files are handled as having a FILE structure data structure. Files
of this kind are called stream files. A pointer to this file structure is called a file pointer,
and is used to specify an input/output file.
The file pointer is defined as
When a file is opened by the fopen function, etc., the file pointer is returned. If the open
processing fails, NULL is returned. Note that if a NULL pointer is specified in another
stream input/output function, that function will end abnormally. When a file is opened, the
file pointer value must be checked to see whether the open processing has been successful.
There are two library function implementation methods: functions and macros.
A function has the same interface as an ordinary user-written function, and is incorporated
during linkage. A macro is defined using a #define statement in the standard include file
relating to the function.
The following points must be noted concerning macros:
(i) Macros are expanded automatically by the preprocessor, and therefore a macro cannot
(ii) If an expression with a side effect is specified as a macro parameter (assignment
In functions such as getc, getchar, and fgetc, which input data from a file, EOF is the
value returned at end-of-file. The name EOF is defined in the <stdio.h> standard include
file.
be invalidated even if the user declares a function with the same name.
expression, increment, decrement), the result is not guaranteed.
Example: Macro definition of MACRO that calculates the absolute value of a
If the following definition is made:
#define
and if
X=MACRO(a++)
is in the program, the macro will be expanded as follows:
X = ((a++) >= 0 ? (a++) : -(a++))
a will be incremented twice, and the resultant value will be different from the absolute
value of the initial value of a.
parameter, is as follows
MACRO(a)
FILE *fp;
((a) >= 0 ? (a) : -(a))
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