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參數(shù)資料
| 型號： | L9935 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | TWO-PHASE STEPPER MOTOR DRIVER |
| 中文描述： | 兩相步進(jìn)電機(jī)驅(qū)動器 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大小： | 159K |
| 代理商： | L9935 |
SDO
SCK
CSN
CSN
μ
P
SDO
SDI
SCK
CSN
SCK
CSN
SCK
SDO
SDI
SDO
SDI
no.1
no.2
no.3
D99AT438
Figure 8. CascadingSeveral Steppermotor drivers.
byte for no. 3
byte for no. 2
byte for no. 1
SCK
EN
CSN
D99AT439
Q
XX
SDO
of
P
Figure 9. Control sequence for 3 Stepper motor drivers.
Testcondition for all propagation times
(unlessotherwise specified)
HIGH
≥
3V; LOW
≤
0.8V;t
r
, t
f
= 10ns, Enable: ENN Low < 0.8V, ENNHigh > V
cc
-0.8V
Symbol
f
SCLK
t
1
Parameter
Test Conditions
Min.
DC
100
Typ.
Max.
2MHz
Unit
SCK-Frequency
SCK stable before and after
CSN = 0
Widthof SCK high pulse
Widthof SCK low pulse
SDI setup time
SDI hold time
SDO delay time (CL = 50pF)
SDO high Z CSN high
Setup time ENABLEto SCK
Propagation delay SPIto
output Q
XX
ns
t
ch
t
cl
t
su
t
sh
t
d
t
zc
200
200
80
80
ns
ns
ns
ns
ns
ns
μ
s
μ
s
100
100
t
en_sck
t
pd
HIGH > V
CC
-1.2V
30
2 (*)
(*) Measured at a transitionfrom High impedance (Bridge off) to bridgeon. (Reversingpolarity takes about 1
μ
s longerbecause the bridge first
turns off before turning on in reverse direction).
Table of bits
bit5,bit4 : current range of bridge A (OutputsA1 and A2)
bit3
: polarityof bridge A
bit2,bit1 : current range of bridge B (OutputsB1 and B2)
bit0
: polarityof bridge B
bit7,bit6 : Error1 and Error 2
Cascading severalDevices
Cascading several devices can be done using the SDO output to pass data to the next device. The
whole framenow consists of n byte.n is the number of devices used.
L9935
13/19
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