DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 683

• 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 21.4 Output Stabilization Delay Time for External Clock
Condition: V
Item
Output stabilization delay time for
external clock
Note:
21.3
The duty adjustment circuit is valid when the oscillation frequency is more than 5 MHz. This
circuit adjusts the duty of the clock output by the oscillator and inputs it to the divider.
21.4
The divider divides the clock output by the duty adjustment circuit, and generates the system clock
(φ) of 1/1, 1/2, and 1/4.
* t
Note: * t
V
EXTAL
φ
(Internal and external)
Figure 21.6 Timing of Output Stabilization Delay Time for External Clock
CC
Duty Adjustment Circuit
Divider
DEXT
CC
2.7 V
DEXT
= 2.7 V to 3.6 V, AV
V
includes a RES pulse width (t
IH
includes a
pulse width (t
Symbol
t
DEXT
CC
= 2.7 V to 3.6 V, V
*
RESW
).
RESW
t
DEXT
).
Min.
500
*
SS
= AV
Max.
⎯
Rev.2.00 May. 28, 2009 Page 643 of 732
SS
= 0 V
Unit
μs
REJ09B0059-0200
Remarks
Figure 21.6