HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 229
HD64F38024DV
Manufacturer Part Number
HD64F38024DV
Description
IC H8/SLP MCU FLASH 80QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300L SLPr
Datasheets
1.US38024-BAG1.pdf
(684 pages)
2.DF36012GFYV.pdf
(1021 pages)
3.DF38102HV.pdf
(145 pages)
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
-
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(7) Low-level interface routines
Table 9.3 List of Low-Level Interface Routines
Name
open
close
read
write
lseek
sbrk
error_addr*
wait_sem*
signal_sem*
Note: Necessary when using a reentrant library.
The function names open, close, read, write, lseek, and sbrk are reserved words for low-level
interface routine. They should not be used in user programs.
When using standard I/O or memory management library functions in a C/C++ program, low-
level interface routines must be created. Table 9.3 lists the low-level interface routines used by
C library functions.
Initialization necessary for low-level interface routines must be performed on program startup.
This initialization should be performed using the _INIT_LOWERLEVEL function described in
section 9.2.2 (5), C/C++ library function initial settings (_INITLIB).
Below, after explaining the basic approach to low-level I/O, the specifications for each
interface routine are described.
(a) Approach to I/O
In the standard I/O library, files are managed by means of FILE-type data; but in low-level
interface routines, positive integers are assigned to actual files in a one-to-one
correspondence for management. These integers are called file numbers.
In the open routine, a file number is provided for an input filename. The open routine must
set the following information such that this number can be used for file input and output.
The device type of the file (console, printer, disk file, etc.) (In the cases of special
devices such as consoles or printers, special filenames must be set by the system and
identified in the open routine.)
When using file buffering, information such as the buffer position and size
Description
Opens file
Closes file
Reads from files
Writes to files
Sets the read/write position in a file
Secures area in memory
Obtains errno address
Waits and acquires semaphore
Releases semaphore
Caution
215
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