Cirrus Logic CS5530 - Manual (Page 20)

CS5530
20 DS742F3
WR3-WR0 (Word Rate) [14:11]
The listed Word Rates are for continuous conversion mode using a 4.9152 MHz clock. All word rates will
scale linearly with the clock frequency used. The very first conversion using continuous conversion mode
will last longer, as will conversions done with the single conversion mode. See the section on Performing
Conversions and Tables 1 and 2 for more details.
Bit WR (FRS = 0) WR (FRS = 1)
0000 120 Sps 100 Sps
0001 60 Sps 50 Sps
0010 30 Sps 25 Sps
0011 15 Sps 12.5 Sps
0100 7.5 Sps 6.25 Sps
1000 3840 Sps 3200 Sps
1001 1920 Sps 1600 Sps
1010 960 Sps 800 Sps
1011 480 Sps 400 Sps
1100 240 Sps 200 Sps
All other combinations are not used.
U/B (Unipolar / Bipolar) [10]
0 Select Bipolar mode.
1 Select Unipolar mode.
OCD (Open Circuit Detect Bit) [9]
When set, this bit activates a 300 nA current source on the input channel (AIN+) selected by the channel
select bits. Note that the 300nA current source is rated at 25°C. This feature is particularly useful in ther-
mocouple applications when the user wants to drive a suspected open thermocouple lead to a supply rail.
0 Normal mode.
1 Activate current source.
NU (Not Used) [8:0]
0 Must always be logic 0. Reserved for future upgrades.