DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 285

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

In this example, DADR = H'0207 (B'0000 0010 0000 0111). The output waveform is shown in
figure 9.6. Since CFS = 1 and the value of the upper eight bits is B'0000 0010, the high width of
the base pulse duty cycle is 2/256 × (T).
Since the value of the subsequent six bits is B'0000 01, an additional pulse is output only at the
location of base pulse No. 63 according to table 9.5. Thus, an additional pulse of 1/256 × (T) is to
be added to the base pulse.
However, when CFS = 0 (base cycle = resolution (T) × 64), the duty cycle of the base pulse is
determined by the upper six bits and the locations of the additional pulses by the subsequent eight
bits with a method similar to as above.
Base pulse
High width: 2/256 × (T)
Base cycle
Figure 9.6 Output Waveform when DADR = H'0207 (OS = 1)
No. 0
Base cycle
No. 1
1 conversion cycle
Base pulse
2/256 × (T)
Additional pulse
1/256 × (T)
Rev.2.00 May. 28, 2009 Page 245 of 732
Base cycle
Additional pulse output location
No. 63
REJ09B0059-0200