©2000-2001 Genesys Logic Inc.—All rights reserved

-6

GL911Tx 1.1

3.6 Button Switches

GL911Tx supports up to 5 buttons. But the Left button and K4 , Right button and K5 are shared with

the same pins. They are read to be left/right buttons when XYEN is high and to be K4/K5 when ZWEN

is high.

BUTR/K5

ZWEN

BUTL/K4

XYEN

BUTM

BUTL/K4

BUTR/K5

D7

1N4148

D2

1N4148

S1

SW

R8

27K

D6

1N4148

D3

1N4148

R6

27K

R7

27K

S3

SW

S5

SW

S2

SW

S4

SW

3D3B

3D5B

4D3B

4D5B

D7

D2

D3

D6

S1

S2

S3

S4

S5

NC

V

SHORT

SHORT

NC

NC

NC

V

V

V

V

V

V

V

V

V

V

V

Figure 3-3:GL911Tx Buttons circuit example

3.7 RF Interface

(a) TXEN: The TXEN is a RF transmitter enable pin (Active high). When there is a packet needs to

be transmitted the TXEN will output high to enable the transmitter. The RF module must transmit

stable Radio Frequency signal within 1ms after enable. The driving capability is 12ma.

(b) TXDATA: The TXDATA is a serial output, which is encoded with Genesys Logic’s proprietary

wireless link protocol into RF transmitter. The baud rate is 4800baud.