IC-MD_17 Datasheet, PDF (24/30 Pages) IC-Haus GmbH – 48-BIT QUADRATURE COUNTER

iC-MD 48-BIT QUADRATURE COUNTE^pR^reliminary
WITH RS422 RECEIVER AND SPI/BISS INTERFACE
Example: CNT0 = 48 bit + NERR + NWARN SPI data access
Rev B1, Page 24/30
SPI READ DATA AB/SPICH(47:0) + NERR + NWARN
Adr
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Measurement Data (SPI read only)
0x08
AB/SPICH(47:40) = CNT0(47:40)
AB/SPICH(39:32) = CNT0(39:32)
AB/SPICH(31:24) = CNT0(31:24)
AB/SPICH(23:16) = CNT0(23:16)
AB/SPICH(15:8) = CNT0(15:8)
AB/SPICH(7:0) = CNT0(7:0)
NERR
NWARN
0b00.0000
Bit 1
Bit 0
Table 62: Register layout
Example: CNT1 = 24 bit + CNT0 = 16 bit + NERR + NWARN SPI data access
SPI READ DATA AB/SPICH(39:0) + NERR + NWARN
Adr
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Measurement Data (SPI read only)
0x08
AB/SPICH(39:32) = CNT1(23:16)
AB/SPICH(31:24) = CNT1(15:8)
AB/SPICH(23:16) = CNT1(7:0)
AB/SPICH(15:8) = CNT0(15:8)
AB/SPICH(7:0) = CNT0(7:0)
NERR
NWARN
0b00.0000
Table 63: Register layout
Bit 1
Bit 0
Default 8 bit data length on remaining addresses
For configuration data (Adr.- 0x00 to 0x07), REF and
SPICH (Adr.- 0x10 to 0x25), ROM (Adr.- 0x42, 0x43)
and Status Bit (Adr.- 0x48 to 0x4A). But it is possible
to read several bytes of data consecutively if the NCS
signal is not reset and SCLK continues being clocked.
The address transmitted is then the start address which
is internally increased by 1 following each transmitted
byte.