HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 110

• 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: -

Table 7.1
Frequency [MHz]
Rd [ ]
Crystal Resonator: Figure 7.3 shows an equivalent circuit of the crystal resonator. Use a crystal
resonator with the characteristics listed in table 7.2.
Table 7.2
Parameter
Rs max [ ]
Co max [pF]
Value to be determined (TBD)
7.2.2
An external clock signal can be input at the EXTAL pin as shown in figure 7.6. The XTAL pin
should be left open. The frequency must be equal to the system clock (CK) frequency. The
specifications for the waveform of the external clock input are given below. Make the external
clock frequency the same as the system clock (CK).
90 RENESAS
External Clock Input
Damping Resistance
Crystal Resonator Parameters
2
500
7
C
Figure 7.2 Connection of the Crystal Resonator (Example)
L1
XTAL
= C
2
1k
Figure 7.3 Crystal Resonator Equivalent Circuit
L2
= IC–22 pF
4
120
7
4
500
L
8
80
7
8
200
Frequency (MHz)
EXTAL
XTAL
C
C
L
0
12
60
7
Rs
12
0
Rd
16
50
7
C
C
EXTAL
16
0
L1
L2
20
40
7
20
0