DF2238RTF6 Renesas Electronics America, DF2238RTF6 Datasheet - Page 839

• Manufacturer Part Number: DF2238RTF6
• Description: MCU 2.2/3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2238RTF6

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 6MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: 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): 2.2 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2238RTF6; HD64F2238RTF6

Table 23.4 External Clock Input Conditions (Duty Adjustment Circuit Unused) (5)
Note: When a duty adjustment circuit is not used, maximum operating frequency is lowered
23.2.3
When two or more external clocks (e.g.:10 MHz and 2 MHz) are used as the system clock, input
clock should be switched in software standby mode.
An example of external clock switching circuit is shown in figure 23.6. An example of external
clock switching timing is shown in figure 23.7.
Item
External clock input
low pulse width
External clock input
high pulse width
External clock
rise time
External clock
fall time
according to the input waveform.
(Example: When t
operating frequency = 16.6 MHz)
Notes on Switching External Clock
(H8S/2239 Group)
EXTAL
Symbol Min
t
t
t
t
EXL
EXH
EXr
EXf
t
EXr
EXL
Figure 23.5 External Clock Input Timing
= t
25
25
—
—
V
EXH
CC
F-ZTAT and Masked ROM
= 3.0 V to
3.6 V
= 25 ns, t
Max
—
—
5
5
t
EXH
EXr
Min
31.25 —
31.25 —
—
—
= t
V
CC
EXf
= 2.7 V to
3.6 V
= 5 ns, clock cycle time = 60 ns, and maximum
Max
6.25
6.25
t
EXf
t
EXL
Rev. 6.00 Mar. 18, 2010 Page 777 of 982
Min
80
80
—
—
Masked ROM
V
CC
Section 23 Clock Pulse Generator
= 2.2 V to
3.6 V
Max
—
—
15
15
V
CC
× 0.5
Unit
ns
ns
ns
ns
REJ09B0054-0600
Test Conditions
Figure 23.5