iC-MR 13-BIT S&H SIN/COS
INTERPOLATOR WITH CONTROLLER INTERFACES
Rev A1, Page 36/44
SERIAL I/O INTERFACE: SSI
Configuration
cesses in write form are possible in SSI mode. As in
iC-MR can transmit position data in SSI protocol, for BiSS mode, the timeout is formed adaptively and thus
which purpose the following parameters give the nec- does not require configuration.
essary settings and options. In addition, register ac-
Figure 24: Example of line signals (SSI)
NESSI
Addr 0x19, bit 4
Protocol
Configuration examples
Code
Information
POS: Singleturn data
Bits
Type
Label
0
1
SSI
BiSS C
13
DATA
Singleturn value ST(23:11)
www.biss-interface.com
Config.
NESSI = 0, ENLC = 0, TMPSCD = 0, ENXCRC = 0,
SSIERR = 0, SSIMODE = 00,
STRESO = 0x0D, MTRESO = 0x7
Table 62: BiSS/SSI protocol selection
Table 64: Format example 1 for 13-bit SSI
Register NESSI must be zeroed so that data can be
transmitted in SSI protocol. SSI ring mode can be acti-
vated by SSIRING. SSIMODE(1:0) sets the data length
of the serial interface in SSI protocol. Possible values
are a 13-bit SSI, a 25-bit SSI, or an extended mode,
the data length of which can be configured as in BiSS
C protocol. In 13-bit or 25-bit SSI mode the error bit
can be attached to the data by SSIERR.
POS: Single- and multiturn data
Bits
12
Type
Label
DATA
DATA
ERROR
Multiturn value MT(11:0)
Singleturn value ST(23:11)
Error nE
13
1
Config.
NESSI = 0, ENLC = 0, TMPSCD = 0, ENXCRC = 0,
SSIERR = 1, SSIMODE = 01,
STRESO = 0x0D, MTRESO = 0x3
Table 65: Format example 2 for 25-bit SSI
SSIRING
Addr. 0x18; bit 1
Function
R/W
Code
0
SSI ring mode deactivated
SSI ring mode activated
Addr. 0x18; bit 0
POS: Single- and multiturn data with life counter
1
Bits
24
26
2
Type
Label
SSIERR
R/W
R/W
DATA
DATA
ERROR
DATA
CRC
Multiturn value MT(23:0)
Singleturn value ST(25:0)
Error nE and warning nW
Life counter LC
0
Standard SSI output without error bit
Standard SSI output with error bit
Addr. 0x19; bit 1...0
1
SSIMODE
6
00
01
10
13-bit SSI protocol
16
Polynomial 0x190D9
25-bit SSI protocol
TMP: Temperature data
Extended SSI protocol (8-85 bit)
16
DATA
CRC
Temperature value TEMP(15:0)
Polynomial 0x25
5
Table 63: SSI Configuration
Config.
NESSI = 0, ENLC = 1, TMPSCD = 1, ENXCRC = 1,
SSIERR = 0, SSIMODE = 10,
STRESO = 0x00, MTRESO = 0x0
Table 66: Format example 3 for extended SSI
ICHAUS [ IC-HAUS GMBH ]
