HD6473834HV Renesas Electronics America, HD6473834HV Datasheet - Page 70

• Manufacturer Part Number: HD6473834HV
• Description: MCU 5V 32K PB-FREE 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD6473834HV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 5MHz
• Connectivity: SCI
• Peripherals: LCD, PWM
• Number Of I /o: 71
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

2.9
2.9.1
Access to Empty Areas: The address space of the H8/300L CPU includes empty areas in addition
to the RAM, registers, and ROM areas available to the user. If these empty areas are mistakenly
accessed by an application program, the following results will occur.
Access to Internal I/O Registers: Internal data transfer to or from on-chip modules other than the
ROM and RAM areas makes use of an 8-bit data width. If word access is attempted to these areas,
the following results will occur.
Byte size instructions should therefore be used when transferring data to or from I/O registers
other than the on-chip ROM and RAM areas. Figure 2.22 shows the data size and number of states
in which on-chip peripheral modules can be accessed.
Data transfer from CPU to empty area
The transferred data will be lost. This action may also cause the CPU to misoperate.
Data transfer from empty area to CPU
Unpredictable data is transferred.
Word access from CPU to I/O register area
Upper byte: Will be written to I/O register.
Lower byte: Transferred data will be lost.
Word access from I/O register to CPU
Upper byte: Will be written to upper part of CPU register.
Lower byte: Unpredictable data will be written to lower part of CPU register.
Application Notes
Notes on Data Access
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