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L9942 Datasheet(PDF) 28 Page - STMicroelectronics

Part # L9942
Description  Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9942 Datasheet(HTML) 28 Page - STMicroelectronics

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6 Logic with SPI - Electrical Characteristics
L9942
28/37
6.6
STEP timing
Table 19.
STEP timing
(1) Parameter guaranteed by design.
Figure 10. Transfer Timing Diagram
Figure 11. Input Timing
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
tSTEPmin
(1)
STEP low or high time
2
µs
A2
A1
time
time
time
time
time
CSN high to low: DO enabled
actual data
DI: data will be accepted on the rising edge of CLK signal
new data
CSN
CLK
DI
DO
Control and Status Register
DO: data will change on the falling edge of CLK signal
status information
fault bit
CSN low to high: actual data is
transfered to registers
old data
12
3
4
5
6
78
9
10 11
012
13
14 15
1
0
actual data
A1 A0 D12 D11 D10 D9 D8 D7 D6
D5 D4
A2
D3 D2
D1 D0
D0
D12 D11 D10 D9 D8 D7 D6
D5 D4 D3 D2
D1 D0
t
CSN_HI,min
fault bit
0.8 VCC
0.8 VCC
0.8 VCC
0.2 VCC
0.2 VCC
0.2 VCC
Valid
Valid
CSN
CLK
DI
t
set CSN
t
CLKH
t
set CLK
t
CL KL
t
hold DI
t
set DI
t
CLK



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