IC-MHM Datasheet, PDF (29/63 Pages) IC-Haus GmbH – 14-BIT ABSOLUTE ANGLE HALL ENCODER

iC-MHM
14-BIT ABSOLUTE ANGLE HALL ENCODER
Rev D1, Page 29/63
DIR_IO2 = 0. A position preset sequence is then initi-
ated when MDI is high.
PRES_IO1
Value
0
1
Addr. 0x0B; bit 2
Function
Conditions: CFG_IOP = 2 or 3, SBL_MTI = 0,
DIR_IO2 = 0
MDI not Dedicated Position Preset Input
MDI is Dedicated Position Preset Input
Table 43: Enable Preset Input P1: Controlling Pin MDI
When ENCMD2 = 0, MCL functions as general-purpose
discrete output 0. When ENCMD2 = 1, an addressed
BiSS command with CMD = 2 sets MCL high and a
BiSS broadcast command with CMD = 2 resets MCL
low. Refer to SERIAL INTERFACE: BiSS MODE on
page 37 for more information.
Incremental Quadrature (ABZ) Outputs
To use the digital I/O port as incremental quadrature
(ABZ) outputs, set CFG_IOP = 2. Pins P1 - P3 then
output standard encoder quadrature signals.
Refer to POSITION OFFSET and PRESET (Zero Posi-
tion) on page 55 for more information.
To use MDI as a dedicated code direction input, set
SBL_MTI = 0, CFG_IOP = 2 or 3, DIR_IO2 = 1, and
PRES_IO1 = 0. The positive code direction (increas-
ing angle) is then controlled by the level at MDI and
parameter DIR.
CFG_IOP = 2
Pin
Function
P1
Channel A Output
P2
Channel B Output
P3
Channel Z Output
Table 46: Digital I/O Port as Incremental Quadrature
Outputs
DIR_IO2
Value
0
1
Addr. 0x0B; bit 3
Function
Conditions: CFG_IOP = 2 or 3, SBL_MTI = 0,
PRES_IO1 = 1
MDI not Dedicated Code Direction Input
MDI is Dedicated Code Direction Input
Figure 17 shows the incremental quadrature outputs
for positive code direction.
Table 44: Enable Code Direction Input P2: Controlling
Pin MDI
Refer to Code Direction (DIR) on page 21 for informa-
tion on determining code direction using the dedicated
code direction input and parameter DIR.
To use MCL as a BiSS-controlled output, set SBL_MTI =
0, CFG_IOP = 2 or 3, and ENCMD2 = 1. The level at
MCL is then determined by BiSS commands.
ENCMD2
Value
0
1
Note:
Addr. 0x0B; bit 5
Function
Conditions: CFG_IOP = 2 or 3, SBL_MTI = 0
MCL is General-Purpose Discrete Output
MCL is BiSS Command Controlled Output
Pin level is low following power-on.
Table 45: BiSS Command 2 Enable: Controlling Pin
MCL
Figure 17: Incremental output
Channel B leads channel A for positive rotation as de-
fined by parameter DIR or a configured code direction
input. The Z output is centered around the iC-MHM’s
zero position and is two quadrature states (180°) wide.
Figure 17 shows the case where OFFS_ST = 0x0000.
Refer to POSITION OFFSET and PRESET (Zero Po-
sition) on page 55 for more information on setting the
iC-MHM’s zero position and parameter OFFS_ST.
If the multiturn is used (RESO_MT =/ 0), the Z output
is active at the zero position only when the iC-MHM’s
internal multiturn counter overflows or underflows. If
the multiturn is not used (RESO_MT = 0), the Z output
is active at the zero position during every revolution of
the magnet.