Cirrus Logic CS8130 - Manual (Page 7)

TRANSMITTER
TXD
1 0 1
On
Off
* LED Output
PIN Input
Light
No Light
RECEIVER
** RXD
A
B
A: 1/baud rate
B: 3/16 of 1/115200 or 3/16 of A (selectable)
C: 3/16 of 1/115200 to 3/16 of A C * LED1C and LED2C go low to turn on LED.
** RXD output is delayed from the PIN diode
input by A (1 bit).
Figure 2. Infra Red Data Format Mode 1 (IRDA/HPSIR)
TRANSMITTER
TXD
1 0 1
On
Off
LED Output
PIN Input
Light
No Light
RECEIVER
RXD
A
A: 1/baud rate
B: 1/527kHz
C: 1/500kHz +/- 10%
C
B
Figure 3. Infra Red Data Format Mode 2 (500kHz ASK)
TRANSMITTER
TXD Data *
1 0 1
On
Off
LED Output
PIN Input
Light
No Light
RECEIVER
RXD Data *
A
A: 1/2400
B: 1/38.4kHz
C: 1/40kHz +/- 10%
C
* The timing of data
on the RXD and TXD pins
is faster than shown here
These numbers are typical values.
TV Remote Bit Rate and Modulation
Frequency are programmable.
B
Figure 4. Infra Red Data Format 3 (TV Remote, 38kHz ASK)
CS8130
DS134PP2 7
CS8130
DS134F1 7