HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 57

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.3.2
Figure 2.4 indicates the data formats in memory.
Word data stored in memory must always begin at an even address. In word access the least
significant bit of the address is regarded as 0. If an odd address is specified, no address error
occurs but the access is performed at the preceding even address. This rule affects MOV.W
instructions and branching instructions, and implies that only even addresses should be stored in
the vector table.
When the stack is addressed by register R7, it must always be accessed a word at a time. When the
CCR is pushed on the stack, two identical copies of the CCR are pushed to make a complete word.
When they are restored, the lower byte is ignored.
Memory Data Formats
Byte data (CCR) on stack
Note: * Ignored on return
Legend:
CCR: 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
25