DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 776

• Manufacturer Part Number: DF61657CN35FTV
• Description: IC H8SX/1657 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61657CN35FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 35MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 768KB (768K x 8)
• Program Memory Type: FLASH
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• For Use With: 3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 19 Clock Pulse Generator
Table 19.2 Crystal Resonator Characteristics
19.2.2
An external clock signal can be input as shown in the examples in figure 19.4. If the XTAL pin is
left open, make sure that parasitic capacitance is no more than 10 pF. When the counter clock is
input to the XTAL pin, make sure that the external clock is held high in standby mode.
For the input conditions of the external clock, refer to table 22.4 in section 22.3.1, Clock Timing.
The input external clock should be from 8 to 18 MHz.
19.3
The PLL circuit has the function of multiplying the frequency of the clock from the oscillator by a
factor of 4. The frequency multiplication factor is fixed. The phase difference is controlled so that
the timing of the rising edge of the internal clock is the same as that of the EXTAL pin signal.
Rev. 2.00 Jun. 28, 2007 Page 750 of 864
REJ09B0341-0200
Frequency (MHz)
R
C
S
0
Max. (pF)
Max. (Ω)
External Clock Input
PLL Circuit
8
80
Figure 19.4 External Clock Input (Examples)
EXTAL
EXTAL
XTAL
XTAL
(b) Counter clock input on XTAL pin
(a) XTAL pin left open
12
60
Open
External clock input
External clock input
7
18
40