l9942 STMicroelectronics, l9942 Datasheet - Page 29

• Manufacturer Part Number: l9942
• Description: Integrated Stepper Motor Driver For Bipolar Stepper Motors With Microstepping And Programmable Current Profile
• Manufacturer: STMicroelectronics

L9942
6.3
Table 23.
6.4
Table 24.
6.5
Table 25.
1. Parameter guaranteed by design.
t
t
V
I
CSN_HI,min
V
t
t
t
dis DO H tri
PWMoutLK
dis DO L tri
en DO tri H
Symbol
Symbol
en DO tri L
V
I
V
C
PWMoutH
DOoutLK
PWMoutL
Symbol
DOoutH
DOoutL
t
t
t
out
d DO
r DO
f DO
(1)
(1)
output low level
output high level
tristate leakage current
tristate leakage current
tristate input capacitance
DO rise time
DO fall time
DO enable time from tristate to low
level
DO disable time from low level to
tristate
DO enable time from tristate to
high level
DO disable time from high level to
tristate
DO delay time
Outputs: DO, PWM
Outputs: DO, PWM
Output: DO timing
Output: DO timing (see
CSN timing
CSN timing
CSN high time, active mode
Parameter
Parameter
Parameter
Figure 12
VCC = 5 V, I
VCC = 5 V, I
V
0 V <
Register3bit5=1 (NPWM)
0 V < V
V
0 V < VCC < 5.3 V
C
C
C
up load to VCC
C
up load to VCC
C
down load to GND
C
pull-down load to GND
V
VCC, C
Transfer of SPI-command to
Input Register
CSN
DO
CSN
L
L
L
L
L
L
= 100 pF,
= 100 pF, I
= 100 pF, I
= 100 pF, I
= 100 pF, I
= 100 pF, I
and
< 0.3 VCC, V
= VCC,
= VCC,
V
Test condition
PWM
Test condition
Test condition
L
DO
= 100 pF
Figure
< VCC
D
D
< VCC
load
load
load
load
load
I
= 2 mA
= -2 mA
load
Logic with SPI - electrical characteristics
13)
= -1 mA pull-
= -1 mA
= 1 mA
= 1 mA pull-
= 4 mA pull-
DO
= -4 mA
> 0.7
VCC -
Min.
Min.
Min.
-10
-10
0.4
2
VCC -
Typ.
Typ.
Typ.
0.2
0.2
10
50
50
50
50
50
50
50
Max.
Max.
Max.
100
100
250
250
250
250
250
0.4
10
10
15
Unit
Unit
Unit
29/40
µA
µA
pF
ns
ns
ns
ns
ns
ns
ns
µs
V
V