DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 823

• Manufacturer Part Number: DF2505FC26V
• Description: IC H8S/2505 MCU FLASH 144QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505FC26V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

This LSI has an on-chip clock pulse generator that generates the system clock (φ), the bus master
clock, and internal clocks. The clock pulse generator consists of a system clock oscillator, PLL
(Phase Locked Loop) circuit, clock selection circuit, medium-speed clock divider, bus master
clock selection circuit, subclock oscillator, and waveform generation circuit.
Figure 21.1 shows a block diagram of the clock pulse generator.
Frequency changes are performed by software by settings in the low-power control register
(LPWRCR) and system clock control register (SCKCR).
EXTAL
XTAL
OSC1
OSC2
Legend:
LPWRCR:
SCKCR:
Low-power control register
System clock control register
Subclock
oscillator
oscillator
System
clock
Figure 21.1 Block Diagram of Clock Pulse Generator
Section 21 Clock Pulse Generator
PLL circuit
generation
Waveform
LPWRCR
(×1, ×2)
circuit
WDT_1 count clock
STC0, STC1
φ
SUB
selection
Clock
circuit
System
clock to
φ pin
clock divider
Rev. 6.00 Sep. 24, 2009 Page 775 of 928
Medium-
speed
peripheral modules
Internal clock to
Section 21 Clock Pulse Generator
φ/2 to
φ/32
φ
selection
SCKCR
master
circuit
clock
Bus
REJ09B0099-0600
Bus master clock
to CPU and DTC
SCK2 to SCK0