DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 187

• 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: -

7.5
The CPU is driven by a system clock, denoted by the symbol φ. The period from one rising edge
of φ to the next is referred to as a "state." The memory cycle or bus cycle consists of one, two, or
three states. Different methods are used to access on-chip memory, on-chip peripheral modules,
and the external address space.
7.5.1
On-chip memory is accessed in one state. The data bus width is 16 bits, enabling both byte and
word transfer. Figure 7.4 shows the on-chip memory access cycle. Figure 7.5 shows the pin states.
Basic Timing
On-Chip Memory (ROM, RAM) Access Timing
Internal address bus
φ
Read
Write
Figure 7.4 On-Chip Memory Access Cycle
Internal read signal
Internal data bus
Internal write signal
Internal data bus
Bus cycle
Address
T
1
Rev. 6.00 Sep. 24, 2009 Page 139 of 928
Read data
Write data
Section 7 Bus Controller
REJ09B0099-0600