HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 966

• 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. volatile_loop Option
952
If the loop control variable is a non-volatile external variable and also the conditional
expression is simple, the volatile_loop option regards the loop control variable as volatile-
qualified to prevent an infinite loop from being created. However, if the loop control variable
is not loop-invariant, it cannot be treated as volatile-qualified.
In Ver.6.01, declare the relevant variable with volatile.
An example program is given below.
Example:
struct{
} ST;
int a;
extern void f();
void func() {
}
In this example, because ST.a may be updated in f(), ST.a is not assumed as loop-invariant
value in the loop. Therefore, ST cannot be treated as volatile even though specified so with the
volatile_loop option.
If the condition in (2) is satisfied, (3) is executed and the ST.a value may be updated.
Accordingly, after the function call, ST.a is to be reloaded.
If the condition in (2) is not satisfied, the ST.a value is not updated so the ST.a value used
in the previous conditional at (1) can be directly used.
unsigned char a:1;
while (ST.a) {
}
if (a) {
}
f();
//
//
//
<- (1)
<- (2)
<- (3)