HD64F3644PV Renesas Electronics America, HD64F3644PV Datasheet - Page 72

• Manufacturer Part Number: HD64F3644PV
• Description: IC H8/3644 MCU FLASH 32K 64SDIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644PV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-SDIP (0.750", 19.05mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 2 CPU
2.9
2.9.1
1. Access to empty areas
2. Access to internal I/O registers
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 2.17 shows the data size and number of states
in which on-chip peripheral modules can be accessed.
Rev. 6.00 Sep 12, 2006 page 50 of 526
REJ09B0326-0600
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.
Data transfer from CPU to empty area:
Data transfer from empty area to CPU:
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.
Word access from CPU to I/O register area:
Word access from I/O register to CPU:
The transferred data will be lost. This action may also cause the CPU to misoperate.
Unpredictable data is transferred.
Upper byte: Will be written to I/O register.
Lower byte: Transferred data will be lost.
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