HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 44

• 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: -

30
L1:
When case=ifthen is specified
When case=ifthen is specified, switch statement codes are created using the if_then method,
which repeats, for all case labels, comparing the evaluated value of the expression in the
switch statement with the case label value and jumps to the statement of the case label if they
match. This method increases the object code size depending on the number of case labels in
the switch statement.
When case=table is specified, switch statement codes are created using the table method,
which stores the case label jump destinations in a jump table and enables a jump to the
statement of the case label that matches the expression in the switch statement by accessing
the jump table only once. This method increases the jump table size in the constant area
depending on the range of case labels in the switch statement, but the execution speed is
always the same.
If this option is not specified, the compiler assumes case=auto is specified.
Example
The following shows an example of a code expansion of a source program (when cpu=2600n)
int a, b;
switch(a){
}
MOV.W
MOV.B
BNE
CMP.B
BEQ
CMP.B
BEQ
CMP.B
BNE
BRA
:
case 1:
case 2:
case 3:
@_a:16,R0
R0H,R0H
Ld
#1,R0L
L1
#2,R0L
L2
#3,ROL
L4
L3
b=3; break;
b=2; break;
b=1; break;
When case=table is specified
Lp:
L1:
MOV.W
SUB.W
CMP.W
BHI
MOV.B
EXTU.W R0
ADD.W
JMP
(jump table)
:
@_a:16,R0
#H’1,R0
#H’2,R0
Ld
@(L1:16,ER0),R0L
#LWORD Lp,R0
@ER0