Motorola CME-12D60 ユーザーズマニュアル

PORTS AND CONNECTORS

LCD_PORT

The LCD_PORT interface is connected to the data bus and memory mapped to locations BF0
– BFF hex assigned to CS7.  For the standard display, address BF0 is the Command register,
address BF1 is the Data register.

The interface supports all OPTREX



  DMC series displays in 8 bit bus mode with up to 80

characters and provides the most common pinout for a dual row rear mounted display
connector.  Power, ground, and Vee are also available at this connector.

+5V

2

1

GND

A0

4

3

LCD-Vee

LCD1

6

5

/RW

D9

8

7

D8

D11 10

9

D10

D13 12 11 D12
D15 14 13 D14

Command Register: $BF0
Data Register:

LCD-Vee is supplied by U13 and is adjusted by the CONTRAST
Potentiometer (adjustable resistor).

See the file  KLCD12D6.ASM  for an example program using this
LCD connector.

LCD3 2

1

LCD2

4

3

LCD4

Additional lines can be used as enables for larger panels and
are mapped as:

LCD2 = $BF4 & $BF5

LCD4 = $BFC & $BFD

LCD3 = $BF8 & $BF9

KEYPAD

PH0

PH1

PH2

PH3

PH4

PH5

PH6

PH7

The KEYPAD connector is a passive 8-pin connector that can be used to
connect a 4 x 4 matrix (16 key) keypad device.  The connector is
mapped to HC12 I/O port H.  This interface is implemented as a software
keyscan.  Pins PH0-3 are used as column drivers which are active high
outputs. Pins PH4-7 are used for row input and will read high when their
row is high.

See the file KLCD12D6.ASM  for an example program using this
connector.