HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 964

• 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: -

950
Example 2:
int a,b;
f() {
}
In this example, if statement (2) has been eliminated and (3) is always executed at all times as
a result of optimization.
Example 3:
int a,b,c;
f() {
}
In this example, expression (1) has been eliminated as a result of optimization.
Due to alias analysis of external variables, a in (1) and a in (2) are handled as the same
value.
Constant value (1) is propagated to expression (2). Accordingly, expression (2) is
converted as follows:
-> if(1)
Therefore, the expression in question is judged as true, the conditional statement is
eliminated, and the above expression (3) is always executed at all times.
Obtains the control flow including the conditional of the if statement expression.
Due to analyzing the control flow analysis and alias analysis of external variables, it is
proved that the value set in a in (1) is not used. Therefore, the above expression (1) is a
redundant expression that is not referenced, and thus it is eliminated.
a=1;
if(a);
{
}
a=1;
if(c);
{
}
a=2;
b=1;
b=1;
//
//
//
//
//
//
//
<- (1)
<- (2)
<- (3)
<- (1)
<- (2)
<- (3)
<- (4)