HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 60

• 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: -

Regexpansion, NORegexpansion: Increasing Number of Registers for Register Variables
C/C++ <Other>[Miscellaneous options :] [Increase a register for register variable]
46
Example
Source program
When byteenum is specified
When byteenum is not specified
Command Line Format
Regexpansion
NORegexpansion
Description
When regexpansion is specified, the compiler increases the number of registers to which
register variables are allocated.
When noregexpansion is specified, the compiler does not increase the number of registers to
which register variables are allocated.
Generally, variable-access speed increases when the number of registers is increased.
For details on register variable allocation, refer to section 9.3.2 (3), Rules concerning registers.
When this option is not specified, the compiler assumes that regexpansion is specified.
Remarks
The regexpansion/noregexpansion specification is invalid when the CPU type is H8SX or
H8S.
_E:
_E:
enum EM {a,b,c} E;
void main(void){E=b;}
mov.b #1,R0L
mov.b R0L,@_E
rts
.res.b 1
mov.w #1,R0
mov.w R0,@_E
rts
.res.w 1
; Transfers a 1-byte data
; Allocates a 1-byte area to E
; Transfers a 2-byte data
; Allocates a 2-byte area to E