HD64F3644DV Renesas Electronics America, HD64F3644DV Datasheet - Page 44

• Manufacturer Part Number: HD64F3644DV
• Description: IC H8/3644 MCU FLASH 64QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644DV

• 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: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 2 CPU
2.3.2
Figure 2.4 indicates the data formats in memory. For access by the H8/300L CPU, word data
stored in memory must always begin at an even address. When word data beginning at an odd
address is accessed, the least significant bit is regarded as 0, and the word data beginning at the
preceding address is accessed. The same applies to instruction codes.
When the stack is accessed using R7 as an address register, word access should always be
performed. The CCR is stored as word data with the same value in the upper 8 bits and the lower 8
bits. On return, the lower 8 bits are ignored.
Rev. 6.00 Sep 12, 2006 page 22 of 526
REJ09B0326-0600
Legend:
CCR:
Note: * Ignored on return
Byte data (CCR) on stack
Memory Data Formats
Condition code register
Word data on stack
Data Type
Word data
Byte data
1-bit data
Figure 2.4 Memory Data Formats
Even address
Even address
Even address
Odd address
Odd address
Odd address
Address
Address n
Address n
MSB
MSB
MSB
MSB
MSB
7
7
6
5
Data Format
Upper 8 bits
Lower 8 bits
4
CCR *
CCR
3
2
1
LSB
LSB
LSB
LSB
LSB
0
0