Figure 4-7: Endian Configuration Register (Bec) - NEC V850E/PH2 User Manual

(1) Endian configuration register (BEC)
This register can be read/written in 16-bit units.
Cautions: 1. Bits 15, 13, 11, 9, 7, 5, 3, and 1 of the BEC register must be cleared (0). If these bits
are set to 1, the operation is not guaranteed.
2. Set the CSn area specified as the programmable peripheral I/O area to Little
Endian format (n = 0 to 7).
3. In the following areas, the data processing method is fixed to Little Endian
method. Any setting of Big Endian method for these areas according to the BEC
register is invalid.
- On-chip peripheral I/O area
- Internal RAM area
- Fetch area of external memory
After reset:
15 14
BEC 0 BE70
CS7
BEn0
0
1
154
Chapter 4 Bus Control Function (μPD70F3187 only)

Figure 4-7: Endian Configuration Register (BEC)

0000H R/W
13 12 11 10
0 BE60 0 BE50
CS6 CS5
Little Endian method
Big Endian method
User's Manual U16580EE3V1UD00
Address: FFFFF068H
9 8 7 6
0 BE40 0 BE30
CS4 CS3
Endian Control
5 4 3 2 1
0 BE20 0 BE10 0
CS2 CS1
0
BE00
CS0