Datasheet

TMC2041 DATASHEET (Rev. 1.02 / 2017-MAY-16) 25
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GENERAL CONFIGURATION REGISTERS (0X00…0X0F)
R/W
Addr
n
Register
Description / bit names
R+C
0x01
4
GSTAT
Bit
GSTAT – Global status flags
0
reset
1: Indicates that the IC has been reset since the last
read access to GSTAT. All registers have been
cleared to reset values.
1
drv_err1
1: Indicates, that driver 1 has been shut down due
to overtemperature or short circuit detection
since the last read access. Read DRV_STATUS1 for
details. The flag can only be reset when all error
conditions are cleared.
2
drv_err2
1: Indicates, that driver 2 has been shut down due
to overtemperature or short circuit detection
since the last read access. Read DRV_STATUS2 for
details. The flag can only be reset when all error
conditions are cleared.
3
uv_cp
1: Indicates an undervoltage on the charge pump.
The driver is disabled in this case.
R
0x02
8
IFCNT
Interface transmission counter. This register becomes
incremented with each successful UART interface write access.
It can be read out to check the serial transmission for lost
data. Read accesses do not change the content. Disabled in SPI
operation. The counter wraps around from 255 to 0.
W
0x03
8
+
4
SLAVECONF
Bit
SLAVECONF
7..0
SLAVEADDR:
Sets the address of unit for the UART interface. The
address becomes incremented by one when the
external address pin NEXTADDR is active.
Range: 0-253 (254), default=0
In ring mode, 0 disables forwarding.
11..8
SENDDELAY:
0, 1: 8 bit times (not allowed with multiple slaves)
2, 3: 3*8 bit times
4, 5: 5*8 bit times
6, 7: 7*8 bit times
8, 9: 9*8 bit times
10, 11: 11*8 bit times
12, 13: 13*8 bit times
14, 15: 15*8 bit times
R
0x04
9
+
8
INPUT
Bit
INPUT
Reads the digital state of all input pins available plus
the state of IO pins set to output.
0
io0_in: IO0 polarity
1
io1_in: IO1 polarity
2
io2_in: IO2 polarity
3
io3_in: IO3 polarity
4
iop_in: IOP pin polarity (always input in SPI mode)
5
ion_in: ION pin polarity (always input in SPI mode)
6
nextaddr_in: NEXTADDR pin polarity
7
drv_enn_in: DRV_ENN pin polarity
8
sw_comp_in: UART input comparator (1: IOP voltage is
above ION voltage). The accuracy is about 20mV.