DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 657

• 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: -

19.1
The H8/3048B Group has a built-in clock pulse generator (CPG) that generates the system clock
( ) and other internal clock signals ( /2 to /4096). After duty adjustment, a frequency divider
divides the clock frequency to generate the system clock ( ). The system clock is output at the
pin *
supporting modules. Frequency division ratios of 1/1, 1/2, 1/4, and 1/8 can be selected for the
frequency divider by settings in a division control register (DIVCR). Power consumption in the
chip is reduced in almost direct proportion to the frequency division ratio *
Notes: 1. Usage of the pin differs depending on the chip operating mode and the PSTOP bit
1
and furnished as a master clock to prescalers that supply clock signals to the on-chip
2. The division ratio of the frequency divider can be changed dynamically during
Overview
setting in the module standby control register (MSTCR). For details, see section 20.7,
System Clock Output Disabling Function.
operation. The clock output at the pin also changes when the division ratio is
changed. The frequency output at the pin is shown below.
where,
= EXTAL
EXTAL: Frequency of crystal resonator or external clock signal
n:
Section 19 Clock Pulse Generator
Frequency division ratio (n = 1/1, 1/2, 1/4, or 1/8)
n
Rev. 3.00 Sep 27, 2006 page 629 of 872
Section 19 Clock Pulse Generator
2
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REJ09B0325-0300