HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 78

• Manufacturer Part Number: HD64F7051SFJ20V
• Description: MCU 5V 256K J-TEMP PB-FREE QFP-1
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7050r

Specifications of HD64F7051SFJ20V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, WDT
• Number Of I /o: 102
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 168-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 4 Clock Pulse Generator (CPG)
The MD3 and MD2 pins should not be changed while the chip is operating, as normal operation
will not be possible in this case.
4.3
Clock pulses can be supplied from a connected crystal resonator or an external clock.
4.3.1
Circuit Configuration: Figure 4.2 shows the example of connecting a crystal resonator. Use the
damping resistance (Rd) shown in table 4.3. An AT-cut parallel-resonance type crystal resonator
should be used. Load capacitors (CL1, CL2) must be connected as shown in the figure.
The clock pulses generated by the crystal resonator and internal oscillator are sent to the PLL
multiplier circuit, where a multiplied frequency is selected and supplied inside the SH7050 chip
and to external devices.
The crystal manufacturer should be consulted concerning the compatibility between the crystal
and the chip.
Table 4.3
Parameter
Rd ( )
Rev. 5.00 Jan 06, 2006 page 56 of 818
REJ09B0273-0500
Clock Source
Connecting a Crystal Oscillator
Damping Resistance Values (Recommended Values)
Figure 4.2 Connection of the Crystal Oscillator (Example)
EXTAL
4
500
XTAL
R
d
C
L1
8
200
= C
L2
Frequency (MHz)
C
= 18Ð22 pF (recommended value)
C
L2
L1
10
0