DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 783

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

External Clock
The external clock signal should have the same frequency as the system clock ( ).
Table 24.4 and figure 24.6 show the input conditions for the external clock.
Table 24.4 External Clock Input Conditions
Table 24.5 shows the external clock output settling delay time, and figure 24.7 shows the external
clock output settling delay timing. The oscillator and duty adjustment circuit have a function for
adjusting the waveform of the external clock input at the EXTAL pin. When the prescribed clock
signal is input at the EXTAL pin, internal clock signal output is fixed after the elapse of the
Item
External clock
input low pulse
width
External clock
input high pulse
width
External clock
rise time
External clock
fall time
Clock low
pulse width
Clock high
pulse width
EXTAL
Symbol Min
t
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
t
EXr
Figure 24.6 External Clock Input Timing
40
40
—
—
0.4
80
0.4
80
V
CC
= 2.7 to 5.5 V
Max
—
—
10
10
0.6
—
0.6
—
t
EXH
Min
20
20
—
—
0.4
80
0.4
80
V
CC
= 5.0 V ±10%
Rev. 4.00 Sep 27, 2006 page 737 of 1130
Max
—
—
5
5
0.6
—
0.6
—
t
EXf
t
EXL
Section 24 Clock Pulse Generator
Unit
ns
ns
ns
ns
t
ns
t
ns
cyc
cyc
Test Conditions
Figure 24.6
V
< 5 MHz
< 5 MHz
CC
5 MHz Figure 26.5
5 MHz
REJ09B0327-0400
0.5