Datasheet

Digilent Pmod™ Interface Specification 1.1.0
Copyright Digilent, Inc. All rights reserved.
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Page 10 of 11
Pin #
Signal
Direction
1
DIR1
Out
2
EN1
Out
3
DIR2
Out
4
EN2
Out
5
GND
6
VCC
DIR1 - Motor/Phase 1 direction
EN1 - Motor/Phase 1 enable, active high
DIR2 - Motor/Phase 2 direction
EN2 - Motor/Phase 2 enable, active high
Pmod Interface Type 5A (Expanded Dual H-Bridge)
This interface provides for controlling two independent H-Bridges with motor speed sensing feedback. The DIR pin
sets the rotational direction of the motor. The EN signal is pulse width modulated to control the effective voltage
applied to the motor. EN is an active high signal, i.e. a high logic level enables current flow through the bridge. The
SA and SB signals are quadrature encoder feedback signals used to sense the motor speed. These are square wave
signals, whose frequency is proportional to motor rotational speed and that are in quadrature. (i.e. 90 out of
phase).
Pin #
Signal
Direction
1
DIR1
Out
2
EN1
Out
3
S1A
In
4
S1B
In
5
GND
6
VCC
7
DIR2
Out
8
EN2
Out
9
S2A
In
10
S2B
In
11
GND
12
VCC
DIR1 - Motor 1 direction
EN1 - Motor 1 enable, active high
SA1 - Motor 1 feedback sense A
SB1 - Motor 1 feedback sense B
DIR2 - Motor 2 direction
EN2 - Motor 2 enable, active high
SA2 - Motor 2 feedback sense A
SB2 - Motor 2 feedback sense B