DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 664

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 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: Lead free / RoHS Compliant
• Eeprom Size: -

Section 19 Clock Pulse Generator
19.3
When the oscillator frequency is 5 MHz or higher, the duty adjustment circuit adjusts the duty
cycle of the clock signal from the oscillator to generate the signal that becomes the system clock.
19.4
The prescalers divide the system clock ( ) to generate internal clocks ( /2 to /4096).
19.5
The frequency divider divides the duty-adjusted clock signal to generate the system clock ( ). The
frequency division ratio can be changed dynamically by modifying the value in DIVCR, as
described below. Power consumption in the chip is reduced in almost direct proportion to the
frequency division ratio. The system clock generated by the frequency divider can be output at the
Rev. 3.00 Sep 27, 2006 page 636 of 872
REJ09B0325-0300
pin.
V
STBY
EXTAL
external)
RES
CC
(internal or
Duty Adjustment Circuit
Prescalers
Frequency Divider
V
IH
Figure 19.7 External Clock Output Settling Delay Timing
t
DEXT