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ZERO_X_A
ZERO_X_B
ZERO_X_C
+5.0V
1
2
3
4
5
6
PIN 1: +5.0V
PIN 2: GROUND
PIN 3: PHASE A
PIN 4: PHASE B
PIN 5: INDEX
PIN 6: HOME
Figure 2-16. Zero-Crossing Encoder Interface
2.20 CAN Interface
The DSP56F807EVM board contains a CAN physical-layer interface chip that is attached
to the MSCAN_RX and MSCAN_TX pins on the DSP56F807. The EVM board uses a
Philips, PCA82C250, high speed, 1Mbps, physical layer interface chip. Due to the +5.0V
operating voltage of the CAN chip, a pull-up to +5.0V is required to level shift the
Transmit Data output line from the DSP56F807. A primary, J24, and daisy-chain, J25,
CAN connector are provided to allow easy daisy-chaining of CAN devices. CAN bus
termination of 120 ohms can be provided by adding a jumper to JG3. Refer to
for the CAN connector signals, and to
+5.0V
DSP56F807
MSCAN_TX
MSCAN_RX
2-24
FILTER
FILTER
FILTER
FILTER
Figure 2-17
1K
CAN Transceiver
TXD
CANH
RXD
+5.0V
VCC
CANL
VREF
SLOPE
GND
PCA82C250T
Figure 2-17. CAN Interface
DSP56F807EVM Hardware User's Manual
JG12
1
3
4
6
7
9
for a connection diagram
Daisy-Chain CAN Connector
CAN Connector
J24
x
x
1
2
3
4
x
5
6
x
x
7
8
x
9
10
x
JG3
CAN Bus
1
Terminator
2
120
DSP56F807
PHASEA1
2
5
PHASEB1
INDEX1
8
HOME 1
Table 2-11
J25
x
1
2
x
3
4
x
5
6
x
x
7
8
x
x
9
10
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