HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 433

• 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: -

double atan2(double y, double x)
Description:
Header file:
Return values:
Parameters:
Example:
Error conditions:
Remarks:
Computes the arc tangent of division of two floating-point numbers.
<math.h>
Normal:
Abnormal:
x
y
The atan2 function returns the arc tangent in the range (– , ] by the radian.
#include <math.h>
double x, y, ret;
A domain error occurs if the values of both x and y are 0.0.
The meaning of the atan2 function is illustrated in figure 10.5. As shown in the
figure, the result of the atan2 function is the angle between the X-axis and a
straight line passing through the origin and point (x, y).
If y = 0.0 and x is negative, the result is . If x = 0.0, the result is ± /2,
depending on whether y is positive or negative.
ret=atan2(y, x);
Figure 10.5 Meaning of atan2 Function
Arc tangent value when y is divided by x.
In case of domain error: Returns not-a-number.
Divisor
Dividend
y
Y
(x, y)
x
atan2 (y, x)
X
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