Digi Rabbit 5000, User Manual

Page: 225 / 414

Chapter 20 Analog Components 225
Analog Component 1 I MSB Register (A1IMR) (Address = 0x0811)
Analog Component 1 Q MSB Register (A1QMR) (Address = 0x0813)
Bit(s) Value Description
7:0 Write
The eight most-significant bits for the fast D/A converter are stored. Writing
these bits transfers the entire 10 bits to the fast D/A converter.
Read These bits always return zeros when read.
Analog Component 1 Control Register (A1CR) (Address = 0x0814)
Bit(s) Value Description
7 0 Use peripheral clock as fast D/A converter clock source.
1 Use Parallel Port PD5 as fast D/A converter clock source.
6:4 000 Clock divided by 2.
001 Clock divided by 4.
010 Clock divided by 8.
011 Clock divided by 16.
100 Clock divided by 32.
101 Clock divided by 64.
110 Clock divided by 128.
111 Clock divided by 256.
3 0 Disable fast D/A converter Q channel.
1 Enable fast D/A converter Q channel.
2 0 Disable fast D/A converter I channel.
1 Enable fast D/A converter I channel.
1 This bit is reserved and should be written with zero.
0 0
Fast D/A converter in normal mode (powered down if both channels are
disabled).
1 Fast D/A converter in sleep mode.