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4.1
70-PIN CONNECTOR PINOUT
Table 16 shows the pin assignments for c18 models using a 70-pin interface connector. The legend below applies to this table.
Legend:
PU: Contains an internal pull-up resistor.
PD: Contains an internal pull-down resistor.
(PU): An external pull-up resistor is required.
(PD): An external pull-down resistor is required.
Pin #
Signal Name
1
GND
2
GND
3
GND
4
GND
5
VCC
6
VCC
7
VCC
8
VCC
9
UART1_RTS
10
USB_VBUS
11
UART1_RXD
12
USB_D+
13
UART1_DSR
98-08901C63-A
4.
CONNECTOR PIN ASSIGNMENTS
Table 16. 70-pin Connector Pinout
Signal Level [V]
–
–
–
–
3.6 – 4.5
3.6 – 4.5
3.6 – 4.5
3.6 – 4.5
2.8
4.4 – 5.25
2.8
3.3
2.8
I/O
–
Power GND.
–
Power GND.
–
Power GND.
–
Power GND.
–
Supply voltage 4.0V DC nominal.
–
Supply voltage 4.0V DC nominal.
–
Supply voltage 4.0V DC nominal.
–
Supply voltage 4.0V DC nominal.
5V tolerant. Should be pulled down
I – (PD)
externally (100 K) when not used.
I
5V nominal.
O
From OEM to PC.
I/O
USB D+
O – PD
Description
39
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