CS5531/32/33/34 - Eshop-Rychle.cz

CS5531/32/33/34Filter Rate Select, FRS[19]0 Use the default output word rates.1 Scale all output word rates and their corresponding filter characteristics by a factor of 5/6.NU (Not Used)[18:0]0 Must always be logic 0. Reserved for future upgrades.2.4. Setting up the CSRs for a MeasurementThe CS5531/32/33/34 have four Channel-SetupRegisters (CSRs). Each CSR contains two 16-bitSetups which are programmed by the user to containdata conversion information such as: 1) which physicalchannel will be converted, 2) at what gain willthe channel be converted, 3) at what word rate willthe channel be converted, 4) will the output conversionbe unipolar or bipolar, 5) what will be the stateof the output latch during the conversion, 6) will theconverter delay the start of a conversion to allowtime for the output latch to settle before the conversionis begun, and 7) will the open circuit detect currentsource be activated for that Setup. In addition,when the OGS bit in the Configuration Register isset, the Setup selects which set of offset and gainregisters to use when performing conversions or calibrations.Note that a particular physical input channelcan be represented in more than one Setup withdifferent output rates, gain ranges, etc. (i.e. eachSetup is independently defined). Refer to section2.4.1 for more details about the Channel SetupRegisters.Each 32-bit CSR is individually accessible andcontains two 16-bit Setups. As an example, to configureSetup 1 in the CS5531/32/33/34 with thewrite individual channel-setup register command(0x05 hexadecimal), bits 31 to 16 of CSR 1 containsthe information for Setup 1 and bits 15 to 0contain the information for Setup 2. Note that whilereading/writing CSRs, two Setups are accessed inpairs as a single 32-bit CSR register. Even if one ofthe Setups isn’t used, it must be written to or read.Examples detailing the power of the CSRs are providedin section 2.6.3.DS289PP5 29