HD6417034AFI20V Renesas Electronics America, HD6417034AFI20V Datasheet - Page 125

• Manufacturer Part Number: HD6417034AFI20V
• Description: MCU 5V 0K I-TEMP PB-FREE 112-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7030r

Specifications of HD6417034AFI20V

• 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 Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 112-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

7.1
The SuperH microcomputer has a built-in clock pulse generator (CPG) that supplies the chip and
external devices with a clock pulse. The CPG makes the chip run at the oscillation frequency of
the crystal resonator. The CPG consists of an oscillator and a duty cycle correction circuit (figure
7.1). The CPG can be made to generate a clock signal by connecting it to a crystal resonator or by
inputting an external clock. (The CPG is halted in standby mode.)
7.2
Clock pulses can be supplied from a connected crystal resonator or an external clock.
7.2.1
Circuit Configuration: A crystal resonator can be connected as shown in figure 7.2. Use the
damping resistance Rd shown in table 7.1. Use an AT-cut parallel resonating crystal with a
frequency equal to the system clock (CK) frequency. Connect load capacitors (C
shown in the figure. The clock pulse produced by the crystal resonator and internal pulse generator
is sent to the duty cycle correction circuit where its duty cycle is corrected. It is then supplied to
the chip and to external devices.
System clock
Overview
Clock Source
Connecting a Crystal Resonator
EXTAL
XTAL
Section 7 Clock Pulse Generator (CPG)
CK
Figure 7.1 Block Diagram of Clock Pulse Generator
Oscillator
correction circuit
Duty cycle
Section 7 Clock Pulse Generator (CPG)
Rev. 7.00 Jan 31, 2006 page 97 of 658
CPG
REJ09B0272-0700
L1
Internal
clock ( )
and C
L2
) as