upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 302

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 7
302
Figure 7-33
Figure 7-34
7.8.2 Access to 16-bit data busses
(1)
This section shows how byte, half word and word accesses are performed for a
16 bit data bus.
Access all data in order starting from the lower order side.
Byte access (8 bits)
(a) Little endian
Left: Access to even address (2n)
Right: Access odd address (2n + 1)
(b) Big endian
Left: Access to even address (2n)
Right: Access to odd address (2n + 1)
Preliminary User’s Manual U17566EE1V2UM00
Byte data
Byte data
7
0
7
0
15
15
8
7
0
8
7
0
data bus
data bus
External
External
2n
2n
Address
Address
Bus and Memory Control (BCU, MEMC)
Byte data
Byte data
7
0
7
0
15
15
8
7
0
8
7
0
data bus
data bus
External
External
2n + 1
2n + 1
Address
Address