MC1151A PMD, MC1151A Datasheet - Page 14

• Manufacturer Part Number: MC1151A
• Description: (MC1x51A) Advanced Step Motor Control Chipset
• Manufacturer: PMD

IC
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IC
CP Chip Pinouts
CP
CP
Pin Name
~HostRead
~HostWrite
~HostSlct
~HostIntrpt
HostData0
HostData1
HostData2
HostData3
HostData4
HostData5
HostData6
HostData7
CPData4
CPData5
CPData6
CPData7
CPData8
CPData9
CPData10
CPData11
~CPReset
Vcc
GND
Pin Name
AtRest1
AtRest2
AtRest3
AtRest4
PosLimit1
PosLimit2
PosLimit3
PosLimit4
Pin #
51
47
48
44
50
61
53
65
67
62
64
60
18
5
6
7
8
17
3
1
43
4, 21, 25, 38, 55
14, 15, 32, 49, 54,
66
Pin #
56
55
54
53
52
45
42
38
Description/Functionality
Host Port Read data (input). Used to indicate that a data word is being read from the chip set
(low asserts read).
Host Port Write data (input). Used to indicate that a data word or command is being written to
the chip set (low asserts write).
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.
Host Interrupt (output). A low assertion on this pin indicates that a host interrupt condition
exists that may require special host action.
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 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 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 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 chip ground pin. All of these pins must be connected to the power supply return.
Description/Functionality
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.
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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