CMD-711EX AXIOM, CMD-711EX Datasheet - Page 11

• Manufacturer Part Number: CMD-711EX
• Description: Microprocessor Development Tool
• Manufacturer: AXIOM

Specifications of CMD-711EX

• Silicon Manufacturer: Freescale
• Kit Contents: Board
• Silicon Family Name: 68HC11E
• Silicon Core Number: MC68HC11E9FN, MC68HC11E20FN
• Development Tool Type: Hardware - Eval/Demo Board
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SERIAL PORT
The onboard serial port COM1 is a simple, three wire asynchronous serial interface with hard wired Clear to Send
(CTS) and Data Terminal Ready (DTR). It is driven by the HC11 internal SCI port using I/O pins PD0 and PD1.
These two logic level signals are coupled through a RS232 level shifter to the COM1 connector.
COM1 is the default serial interface for the Buffalo Monitor and programming software.
KEYPAD Connector
The KEYPAD connector is an eight position connector that implements 4 bits of Port D and 4 bits of Port E as a
passive keypad interface. This interface is implemented as a software keyscan. Pins PD2 - PD5 are columns which
are Set High to read the row conditions on PE0 - PE3 which are Active High. See the file KEYLCD-E.ASM on the
software disk for an example program using this keypad connector.
LCD_PORT Connector
The LCD Display interface is connected to the data bus and memory mapped to locations $B5F0 through $B5F3.
Addresses $B5F0 and $B5F1 are the Command and Data registers respectfully. The LCD interface supports all
OPTREX
are also available at the LCD_PORT connector.
SPARE Connector
The Spare connector supplies 2 channels of RS232 serial translation for developer use as follows:
See the file KEYLCD-E.ASM on the software disk for an example program using this LCD connector.
COM1
7
9
8
6
/LCDCS
Ÿ
Ÿ
Ÿ
Ÿ
4
3
2
1
+5V
DB9S Style Connector
D1
D3 10
D5 12
D7 14
Ÿ
Ÿ
A0
DMC series displays up to 80 characters and provides the most common pinout. Power, ground and Vee
Ÿ
Ÿ
Ÿ
1
D2 D3 D4 D5 E0 E1 E2 E3
Receive Data TTL level
Transmit Data TTL level
Transmit Output RS232 level
Receive Input RS232 level
2 TXD
5 GND
3 RXD
1
4
2
2
4
6
8
3
11 D4
13 D6
1
3
5
7
9
4
GND
Vee
/RW
D0
D2
5
6
7
Cut-Away jumpers between the following pins:
COM1 is set to connect directly to a PC serial port with a straight through
type cable (supplied).
8
4 à 1 and 6 (DTR/DSR/DCD)
7 à 8 (RTS/CTS)
B5F0 LCD Command Register
B5F1 LCD Data Register
11