User's Manual

TM70Pi V3.2 (11/03) 120021.pdf. 79
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OUTPUTS
Each analogue output has two serial relays that switch the output signal to one of two ways, the direct or the
inverse. If not activate any of the relays, both outputs (the direct and inverse) are disconnected.
OUTPUT PWM1
The connections of the output 1 are through 4 pole terminal plug, with the follow pin assignment:
Output 1 connector
Pin Name Function
VPP1 Power of channel 1
GND1 Ground of channel 1
VO1 DIRECT analogue PWM output of channel 1
VR1 INVERSE analogue PWM output of channel 1
OUTPUT PWM2
The connections of the output 1 are through 4 pole terminal plug, with the follow pin assignment:
Output 2 connector
Pin name Function
VPP2 Power of channel 2
GND2 Ground of channel 2
VO2 DIRECT analogue PWM output of channel 2
VR2 INVERSE analogue PWM output of channel 2
ISP (PROGRAMACION “IN CIRCUIT” / “IN SYSTEM”)
The expansion has a connector to record “In-System” (eg. Microprocessor software update). This connector has
10 pins:
ISP connector
Pin name Function
ISP2 Input connected to the ground to place the microcontroller in recording mode
TX2 Not used
RX2 Receiving data signal
GND Ground
RX1 Receiving data signal
TX1 Transmisión data signal
ISP Not used
VCC Power supply output at 3,3 V
MRNOT Reset input, active when it is connected to ground
+VI Power supply output at 12 V (not stabilized, can vary between 8 y 22 V)