AMIS-30521 Datasheet, PDF (2/26 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver

AMIS-30521 Micro-stepping Motor Driver
Data Sheet
4.0 Block Diagram
VDD CPN CPP VCP VBB
CLK
Timebase
Chargepump
CS
DI
DO
NXT
DIR
SLA
CLR
ERR
POR
EMC
P
SPI
T
OTP
R
W
M
A
N
I-sense
S
L
Logic &
Registers
Load
Angle
A
T
EMC
O
P
R
W
M
Temp.
Sense
I-sense
Band-
gap
AMIS-30521
PC20070322.1
GND
Figure 1: Block Diagram AMIS-30521
MOTXP
MOTXN
MOTYP
MOTYN
5.0 Pin Description
Table 2: Pin List and Description
Name
Pin
DO
31
VDD
32
GND
1
DI
2
CLK
3
NXT
4
DIR
5
ERRB
6
SLA
7
CPN
9
CPP
10
VCP
11
CLR
12
CSB
13
VBB
14
MOTYP
15, 16
GND
17, 18
MOTYN
19, 20
MOTXN
21, 22
GND
23, 24
MOTXP
25, 26
VBB
27
/
8, 28, 30
TST0
29
Description
SPI data output
Logic Supply Input (needs external decoupling capacitor)
Ground, heat sink
SPI data in
SPI clock input
Next micro-step input
Direction input
Error Output
Speed Load Angle Output
Negative connection of charge pump capacitor
Positive connection of charge pump capacitor
Charge-pump filter-capacitor
“Clear” = Chip Reset input
SPI chip select input
High Voltage Supply Input
Negative end of phase Y coil output
Ground, heat sink
Positive end of phase Y coil output
Positive end of phase X coil output
Ground, heat sink
Negative end of phase X coil output
High Voltage Supply Input
No Function (to be left open in normal operation)
Test pin (to be tied to ground in normal operation) input
AMI Semiconductor – June 2007, M-20683-001
2
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