HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 968

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 22B Clock Pulse Generator
(H8S/2639 Group, H8S/2635 Group)
Bits 1 and 0—Frequency Multiplication Factor (STC1, STC0): The STC bits specify the
frequency multiplication factor of the PLL circuit.
Bit 1
STC1
0
1
Note: A system clock frequency multiplied by the multiplication factor (STC1 and STC0) should
22B.3 Oscillator
Clock pulses may be supplied either by connecting a crystal oscillator or inputting an external
clock. In the latter case, the input clock frequency should be between 4 MHz and 5 MHz.
22B.3.1 Connecting a Crystal Resonator
Circuit Configuration: A crystal resonator can be connected as shown in the example in figure
22B-2. Select the damping resistance R
crystal should be used.
Table 22B-2 Damping Resistance Value
Frequency (MHz)
R
Page 918 of 1458
d
(Ω)
not exceed the maximum operating frequency defined in section 24, Electrical
Characteristics.
Bit 0
STC0
0
1
0
1
Figure 22B-2 Connection of Crystal Resonator (Example)
EXTAL
XTAL
×1
×2
×4
Setting prohibited
Description
4
500
R
d
d
according to table 22B-2. An AT-cut parallel-resonance
C
C
L1
L2
C
L1
= C
5
200
L2
= 10 to 22pF
H8S/2639, H8S/2638, H8S/2636,
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
(Initial value)
May 28, 2010