DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 681

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Table 21.2 Crystal Resonator Parameters
Frequency(MHz)
R
C
21.2.2
Figure 21.4 shows a typical method of connecting an external clock signal. To leave the XTAL pin
open, parasitic capacitance should be 10 pF or less.
To input an inverted clock to the XTAL pin, the external clock should be set to high in standby
mode. External clock input conditions are shown in table 21.3.
S
0
(max.) (pF)
(max.) (Ω)
External Clock Input Method
(b) Example of external clock input when an inverted clock is input to XTAL pin
EXTAL
XTAL
EXTAL
XTAL
Figure 21.4 Example of External Clock Input
10
70
7
(a) Example of external clock input when XTAL pin left open
12
60
7
16
50
7
Open
Rev.2.00 May. 28, 2009 Page 641 of 732
20
40
7
External clock input
External clock input
REJ09B0059-0200