Nova Electronics MCX514, Руководство пользователя

Страница: 186 / 279

NOVA electronics Inc. MCX514 -
173
－ 173 －
6.2 Register Address by 8-bit Data Bus
In case of the 8-bit data bus access, the 16-bit data bus can be divided into high and low word byte. As shown in the table below,
xxxxL is the low word byte (D7~D0) of 16-bit register xxxx, xxxxH is the high word byte (D15~8) of 16-bit register xxxx. To the
command register (WR0L, WR0H), make sure to first write the high word byte (WR0H), and next write the low word byte
(WR0L).
■
Write Register in 8-bit Data Bus
Address
A3 A2 A1 A0
Write Register
0 0 0 0 WR0L
0 0 0 1 WR0H
0 0 1 0 WR1L
0 0 1 1 WR1H
0 1 0 0 WR2L
0 1 0 1 WR2H
0 1 1 0 WR3L
0 1 1 1 WR3H
1 0 0 0 WR4L
1 0 0 1 WR4H
1 0 1 0 WR5L
1 0 1 1 WR5H
1 1 0 0 WR6L
1 1 0 1 WR6H
1 1 1 0 WR7L
1 1 1 1 WR7H
■
Read Register in 8-bit Data Bus
Address
A3 A2 A1 A0
Read Register
0 0 0 0 RR0L
0 0 0 1 RR0H
0 0 1 0 RR1L
0 0 1 1 RR1H
0 1 0 0 RR2L
0 1 0 1 RR2H
0 1 1 0 RR3L
0 1 1 1 RR3H
1 0 0 0 RR4L
1 0 0 1 RR4H
1 0 1 0 RR5L
1 0 1 1 RR5H
1 1 0 0 RR6L
1 1 0 1 RR6H
1 1 1 0 RR7L
1 1 1 1 RR7H
6.3
Register Address by I2C Serial Interface Bus Mode
When MCX514 is used in I
2
C serial interface bus, the user can access a register address by slave address control.
Follow the same way to specify a register address as described in chapter 6.2, dividing the 16 bit data bus into high and low word
byte.
For more details of I
2
C serial interface bus, see chapter 4.