Datasheet

Programming manual L6474
42/52 Doc ID 022529 Rev 3
The TQREG bit sets if the torque regulation (see Section 7.4) is performed through the
ADCIN voltage (external) or TVAL register (internal):
The TOFF time is used by current control system. If its value is lower than the TOFF_MIN
one, the OFF time is equal to TOFF_MIN.
Any attempt to write the CONFIG register when the outputs are enabled causes the
command to be ignored and the NOTPERF_CMD flag to rise (see Section 9.1.13).
9.1.13 STATUS
When HiZ flag is high, it indicates that the bridges are in high impedance state. Enable
command makes the device exit from High Z state unless error flags forcing a High Z state
are active.
Table 25. Programmable power bridge output slew-rate values
POW_SR [1..0] Output Slew-rate (1) [V/μs]
(1)
1. See SRout_r and SRout_f parameters in the electrical characteristics Table 5 for details.
0 0 320
0 1 75
1 0 110
1 1 260
Table 26. External torque regulation enable
TQREG External torque regulation enable
0 Internal registers
1 ADC input
Table 27. OFF time
TOFF [4..0] OFF time
0 0 0 0 0 4 µs
0 0 0 0 1 4 µs
0 0 0 1 0 8 µs
… … … … … …
1 1 1 1 1 124 µs
Table 28. STATUS register
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
1 1 1 OCD TH_SD TH_WRN UVLO WRONG_CMD
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
NOTPERF_CMD 0 0 DIR 0 0 1 HiZ