DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 682

• 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 21.3 External Clock Input Conditions
When a specified clock signal is input to the EXTAL pin, internal clock signal output is
determined after the external clock output stabilization delay time (t
signal output is not determined during the t
in the reset state. Table 21.4 shows the output stabilization delay time for the external clock.
Figure 21.6 shows the timing of the output stabilization delay time for the external clock.
Rev.2.00 May. 28, 2009 Page 642 of 732
REJ09B0059-0200
Item
External clock input pulse
width low level
External clock input pulse
width high level
External clock rising time
External clock falling time t
Clock pulse width low
level
Clock pulse width high
level
EXTAL
t
EXr
Figure 21.5 External Clock Input Timing
Symbol
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
VCC = 3.0 to 3.6 V
Min.
15
15
⎯
⎯
0.4
0.4
t
EXH
DEXT
cycle, a reset signal should be set to low to hold it
Max.
⎯
⎯
5
5
0.6
0.6
t
EXf
t
EXL
Unit
ns
ns
ns
ns
t
t
cyc
cyc
DEXT
) has passed. As the clock
V
CC
× 0.5
Test Conditions
Figure 21.5
Figure 24.3