L9935(1999) 데이터 시트보기 (PDF) - STMicroelectronics
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L9935 Datasheet PDF : 19 Pages
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L9935
These sequences are intended to give the user a good starting point for his software development. Be-
sides these two there are further possibilities how to implement control sequences for this device (other
currents, quarters step etc.).
SDI
SDO
A B A1 A2 B1 B2 A1 A2 B1 B2 therm. therm.
*) *) *) *)
O O S S S S S S S S alarm
shut
P PHHHHHHHH
down
E E OOOOOOOO
(reset
N NR R R RR RR R
operating
TT TTTT T T
codes)
VS VS VS VS GND GND GND GND
bit 76543210 76543210 76 76 76 76 76 76 76 76 76 76 76
XX111111 previous code
XX011111 11111111 11 11 11 11 11 11 11 11 11 11 00
XX011111 11011111 11 11 11 01 11 11 10 11 11 11 00
XX011111 11011111 11 11 11 01 11 11 10 11 11 11 00
XX011011 11011111 11 11 11 01 11 11 10 11 11 11 00
XX111011 11011111 11 11 11 01 11 01 10 11 10 11 00
XX010011 11011011 01 11 01 01 11 01 01 11 10 11 00
XX010111 11111011 11 11 01 11 11 01 11 10 10 11 00
XX010010 11010011 11 01 01 11 01 01 11 10 01 11 00
XX110010 11010111 11 11 01 11 01 11 11 10 11 10 00
XX011010 11110010 01 11 01 01 01 11 11 01 11 10 00
XX011110 11011010 11 11 11 01 01 11 10 11 11 10 00
XX011011 11011110 11 01 11 01 01 01 01 11 11 01 00
XX111011 11011011 11 11 01 01 11 01 10 11 10 11 00
XX010011 11111011 01 11 01 01 11 01 01 11 10 11 00
XX010111 11010011 11 11 01 11 11 01 11 10 10 11 00
XX010010 11010111 11 01 01 11 01 01 11 10 01 11 00
XX110010 11010010 11 11 01 11 01 11 11 10 11 10 00
76543210
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
Double errors: Double errors will create composite codes by an AND operation between columns of the
same dominance. Open and short to VS are the least dominant error codes. (first 6 error code columns).
Short to ground is the second dominant error code. detection of short to gnd will overwrite error codes of
the least dominant kind (open, short to VS). Temperature prealarm and thermal shut down are the most
dominant error codes. Thermal prealarm returns error code 00 but the device still is working and returns
the appropriate operation code (bits 0..5).
Thermal shut down returns error code 00 and turns off the device. The opcode returned corresponds the
action eventually performed (bit 0..5 become 1).
For example open bridge A and simultaneously open bridge B will lead to error code 01 by performing
an AND operation between the two corresponding columns.
*) Motor resistance approximatelly 10Ω and VS = 12V. So a short to ground only is detected on one branche of the bridge. Lower resistivity of
the motor may lead to detection of short to ground on both branches of the bridge leading to code 10 on all steps.
Electromagnetic Emission classification(EME)
Electromagnetic Emission classes presented below are typical data found on bench test. For detailed test de-
scription please refer to ’Electromagnetic Emission (EME) Measurement of Integrated Circuits, DC to 1GHz’ of
VDE/ZVEI work group 767.13 and VDE/ZVEI work group 767.14 or IEC project number 47A 1967Ed. This data
is targetedto boarddesigners to allow an estimation of emission filtering effortrequired in application.
Pin
EME class
GND
E
10
0
VCC
E
e
EN. SDI, CSN, CSK, SDO in tristate
K
h
SDO
G
f
Power output A1, A2, B1, B2
E
5
f
Power output A1, A2, B1, B2
6
f
Electromagnetic Emission is not tested in production.
Remark
1Ω test
Blocked with 100nF closemto the device
SDO in low-Z state, no data transfer
Sourcing output
Sinking output in chopping mode fosc = 20kHz
15/19
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