HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 112

• Manufacturer Part Number: HD6477021X20V
• Description: MCU 5V 32K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7020r

Specifications of HD6477021X20V

• Core Processor: SH-1
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Duty cycle correction circuit: Duty cycle corrections are conducted for an input clock over 5
MHz. Duty cycles may not be corrected if under 5 MHz, but AC characteristics for the high-level
pulse width (t
operate normally. Figure 7.7 shows the standard characteristics of a duty cycle correction.
This duty cycle correction circuit is not for correcting the input clock's transient fluctuations and
jutters.
92 RENESAS
Figure 7.7 Duty Cycle Correction Circuit Standard Characteristics
CH
) and low-level pulse width (t
Figure 7.6 Precaution on Oscillator Circuit Board Design
70
60
50
40
30
Input duty
C
C
70
60
50
40
30
1
L1
L2
2
Input frequency
CL
No crossing
signal lines
) of the clock are satisfied, and the LSI will
5
10
XTAL
EXTAL
(MHz)
20