User`s guide

Registers Format
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23
Data Format:
Bit 7 6 5 4 3 2 1 0
Base + 6 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
Base + 7 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8
Address : BASE + 13 & BASE + 14
Attribute: write only
Data Format:
Bit 7 6 5 4 3 2 1 0
Base + 13 DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
Base + 14 DO15 DO14 DO13 DO12 DO11 DO10 DO9 DO8
3.9 D/A Output Register
The D/A converter will convert the D/A output register data to the
analog signal. The register data of the address Base + 4 and Base
+ 5 are used for D/A conversion.
Address : BASE + 4 & BASE + 5
Attribute: write only
Data Format:
Bit 7 6 5 4 3 2 1 0
Base + 4 DA7 DA6 DA5 DA4 DA3 DA2 DA1 DA0
Base + 5 X X X X DA11 DA10 DA9 DA8
DA0 is the LSB and DA11 is the MSB of the 12 bit data.
X: don't care
Note: The D/A registers are "double buffered" so that the D/A analog
output signals will not updated until the second (high) byte is
written. This can insure a single step transition when the D/A
conversion.