HD6473258P10 Renesas Electronics America, HD6473258P10 Datasheet - Page 27

• Manufacturer Part Number: HD6473258P10
• Description: IC H8 MCU OTP 32K 64DIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/325r

Specifications of HD6473258P10

• Core Processor: H8/300
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI, UART/USART
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -

External memory is accessed a byte at a time in three or more states. The basic bus cycle is three
states, but additional wait states can be inserted on request.
2.3.2 IOS
There are two gaps in the on-chip address space above the on-chip RAM. Addresses H’FF80 to
H’FF8F, situated between the on-chip RAM and register field, are off-chip. Addresses H’FFA0 to
H’FFAF are also off-chip. These 32 addresses can be conveniently assigned to external I/O devices.
To simplify the addressing of devices at these addresses, an IOS signal is provided that goes low
when the CPU accesses addresses H’FF00 to H’FFFF. The IOS signal can be used in place of the
upper 8 bits of the address bus.
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