Maxim Integrated DS4830 Optical Microcontroller User Manual
Page 70
DS4830 User’s Guide
70
(channel 7 + differential mode) and 06h (channel 6 + single-ended). See below Table 9-2 for the quick trip list
configurations.
To scan (See Figure 9-2) these list registers, the QTSTART bits are set to 0 (0000b) and the QTSTOP bits is set to 3
(0011b). Each channel is scanned twice (See Figure 9-2). First the low trip threshold (LT) is scanned and then the high
trip threshold (HT).
Table 9-2. Quick Trip List Configuration
Quick Trip Start address (QTSTART) = 0
Quick Trip Stop address (QTEND) = 3
The quick trip threshold can be calculated by using the following formula.
Below table demonstrates Quick Trip low and high threshold configuration.
Table 9-3. Quick Trip Low Threshold Configuration
QTCN = 0x0000;
//Low Threshold Configuration Register, Index = 0
QTDATA = 0x0100;
//0.6V Low Threshold Configuration for List0 Configuration
QTDATA = 0x0154;
//0.8V Low Threshold Configuration for List1 Configuration
QTDATA = 0x01AC;
//1.0V Low Threshold Configuration for List2 Configuration
QTDATA = 0x01D4;
//1.1V Low Threshold Configuration for List3 Configuration
Table 9-4. Quick Trip High Threshold Configuration
QTCN = 0x0010;
//High Threshold Configuration Register, Index = 0
QTDATA = 0x03AC;
//2.2V High Threshold Configuration for List0 Configuration
QTDATA = 0x0354;
//2.0V High Threshold Configuration for List1 Configuration
QTDATA = 0x0300;
//1.8V High Threshold Configuration for List2 Configuration
QTDATA = 0x02AC;
//1.6V High Threshold Configuration for List3 Configuration
QT List Number
QTDATA Description
List Registers Used for comparison
0
05h
Channel 5 (S5) in single-ended mode
LT0 and HT0
1
06h
Channel 6 (S6) in single-ended mode
LT1 and HT1
2
17h
Channel 7(S14-S15) in differential mode
LT2 and HT2
3
06h
Channel 6 (S6) in single-ended mode
LT3 and HT3
QT List Number
Low Threshold Value (as Example)
QTDATA
0
0.6V
0x0100
1
0.8V
0x0154
2
1.0V
0x01AC
3
1.1V
0x01D4
QT List Number
High Threshold Value (as Example)
QTDATA
0
2.2V
0x03AC
1
2.0V
0x0354
2
1.8V
0x0300
3
1.6V
0x02AC