Motorola CME-12D60 manual COM1, COM2, Analog Port, TXD0 RXD0 GND, TXD1 RXD1 GND

COM1

TXD0

RXD0

GND

1

26

37

48

59

The COM-1port has a Female DB9 connector that interfaces to the HC12 internal SCI0 serial port. It uses a simple 2 wire asynchronous serial interface and is translated to RS232 signaling levels.

Pins 1, 4, and 6 are connected for default handshake standards. Pins 7 and 8 are connected for default handshake standards.

Handshake pins can be easily isolated and connected to I/O ports if necessary.

COM2

TXD1

RXD1

GND

12

34

56

78

910

The COM-2connector interfaces to the HC12 internal SCI1 serial port. It uses a simple 2 wire asynchronous serial interface and is translated to RS232 signaling levels. This connector supports a standard IDC ribbon cable to DB9 socket.

Pins 1, 2, and 7 are connected for default handshake standards.

Pins 4 and 6 are connected for default handshake standards.

ANALOG PORT

The ANALOG port provides access to the Port AD0 and Port AD1 Analog-to-Digital input lines of the HC912D60 as follows:

PAD0

PAD1

PAD2

PAD3

PAD4

PAD5

PAD6

PAD7

VRL0

VRL1

VSSA GND GND

1 2 PAD10

3 4 PAD11

5 6 PAD12

7 8 PAD13

9 10 PAD14

11 12 PAD15

13 14 PAD16

15 16 PAD17

17 18 VRH0

19 20 VRH1

21 22 VDDA

23 24 +5V

25 26 +5V

PAD0 – PAD7 HC12 Port AD0 is an input port or A/D Converter inputs.

PAD10 – PAD17 HC12 Port AD1 is an input port or A/D Converter inputs.

VRH / VRL HC12 A/D Converter Reference Pins. See A/D Reference Section. To provide an external reference voltage, R3,4,10 and 32 may need to be removed. See schematic.

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