EDE1144 查看數據表（PDF） - Unspecified

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EDE1144

4 x 4 Matrix Keypad Encoder IC

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EDE1144 Keypad Encoder IC

PIN DEFINITIONS

Keypad Connection Pins:

(R0) Row 0 / Data 0 Output (Pin 6)........................................Multiplexed Keypad Row 0,

Host System Data Input 0

(R1) Row 1 / Data 1 Output (Pin 7)........................................Multiplexed Keypad Row 1,

Host System Data Input 1

(R2) Row 2 / Data 2 Output (Pin 8)........................................Multiplexed Keypad Row 2,

Host System Data Input 2

(R3) Row 3 / Data 3 Output (Pin 9)........................................Multiplexed Keypad Row 3,

Host System Data Input 3

(C0) Column 0 Input (Pin 10).................................................Multiplexed Keypad Column 0

(through 330 resistor)

(C1) Column 1 Input (Pin 11).................................................Multiplexed Keypad Column 1

(through 330 resistor)

(C2) Column 2 Input (Pin 12).................................................Multiplexed Keypad Column 2

(through 330 resistor)

(C3) Column 3 Input (Pin 13).................................................Multiplexed Keypad Column 3

(through 330 resistor)

Control & Data Pins:

Baud (Pin 2)...........................................................................Baud Rate Selection;

0=2400, 1=9600

XMIT (Pin 1)..........................................................................Serial Data Output (N-8-1);

RS232 (TTL/CMOS Voltages)

Valid (Pin 17).........................................................................Data Valid Signal / Interrupt:

Parallel data valid when low

Beep (Pin 18)..........................................................................Modulated Output Signal:

Oscillates on keypress or repeat

Clock / Power Pins:

OSC1 (Pin 16)........................................................................One pin of 4MHz parallel-cut

crystal or resonator, or a direct

TTL clock input

OSC2 (Pin 17)........................................................................Other pin of 4MHz parallel-cut

crystal or resonator, or leave

floating if OSC1 driven with

a TTL clock input

+5V (Pins 3,4,14)..................................................................Connect to +5V DC

GND (Pin 5)...........................................................................Connect to 0V DC (Ground)

Note: DIP are SOIC (surface mount) packages of the EDE1144 have identical pinout and

pincount. Please specify EDE1144/P (DIP) or EDE1144/SO (SOIC) when ordering.

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