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MC1451A Datasheet(PDF) 14 Page - List of Unclassifed Manufacturers

Part No. MC1451A
Description  Advanced Step Motor Control Chipset
Download  51 Pages
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Maker  ETC1 [List of Unclassifed Manufacturers]
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MC1451A Datasheet(HTML) 14 Page - List of Unclassifed Manufacturers

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14
IC
Pin Name
Pin #
Description/Functionality
I/O
~HostRead
51
Host Port Read data (input). Used to indicate that a data word is being read from the chip set
(low asserts read).
I/O
~HostWrite
47
Host Port Write data (input). Used to indicate that a data word or command is being written to
the chip set (low asserts write).
I/O
~HostSlct
48
Host Port Select (input). Used to select the host port for reading or writing operations (low
assertion selects port). ~HostSlct must remain inactive (high) when the host port is not in use.
I/O
~HostIntrpt
44
Host Interrupt (output). A low assertion on this pin indicates that a host interrupt condition
exists that may require special host action.
I/O
HostData0
HostData1
HostData2
HostData3
HostData4
HostData5
HostData6
HostData7
50
61
53
65
67
62
64
60
Host Port Data 0-7 (bi-directional, tri-stated). These signals form the 8 bit host data port used
during communication to/from the chip set. This port is controlled by ~HostSlct, ~HostWrite,
~HostRead and HostCmd.
I/O
CPData4
CPData5
CPData6
CPData7
CPData8
CPData9
CPData10
CPData11
18
5
6
7
8
17
3
1
I/O chip to CP chip data port (bi-directional). These 8 bits are connected to the corresponding
Data4-11 pins on the CP chip, and facilitate communication to/from the I/O and CP chips..
I/O
~CPReset
43
I/O chip set reset (input). When brought low this pin resets the I/O chip to its initial condition.
Reset should occur no less than 250 mSec after stable power has been provided to the chip
set. This signal should be connected to the ~Reset pin of the CP chip, which in turn should
be connected to the master reset signal.
I/O
Vcc
4, 21, 25, 38, 55
I/O chip supply voltage pin. All of these pins must be connected to the supply voltage. Supply
voltage = 4.75 to 5.25 V
I/O
GND
14, 15, 32, 49, 54,
66
I/O chip ground pin. All of these pins must be connected to the power supply return.
IC
Pin Name
Pin #
Description/Functionality
CP Chip Pinouts
CP
AtRest1
AtRest2
AtRest3
AtRest4
56
55
54
53
At Rest indicator signals for axes 1-4 (output). A high level on this signal indicates the axis is
at rest. A low signal indicates the axis is in motion.
This signal is useful for driving amplifiers with an input bit to control running and holding
torque.
NOTE: For MC1451A all 4 pins are valid. For MC1251A pins for axes 1 & 2 only are valid.
For MC1151A pin for axis 1 only is valid. Invalid axis pins can be left un connected.
CP
PosLimit1
PosLimit2
PosLimit3
PosLimit4
52
45
42
38
Positive limit switch input for axis 1-4. These signals provide directional limit inputs for the
positive-side travel limit of the axis. Upon powerup these signals default to "active high"
interpretation, but the interpretation can be set explicitly using the SET_LMT_SENSE
command. If not used these signals should be tied low for the default interpretation, or tied
high if the interpretation is reversed.
NOTE: For MC1451A all 4 pins are valid. For MC1251A pins for axes 1 & 2 only are valid.
For MC1151A pin for axis 1 only is valid. Invalid axis pins can be left un connected.


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