toim3232 ETC-unknow, toim3232 Datasheet - Page 3

• Manufacturer Part Number: toim3232
• Description: Infrared Irda Integrated Interface Circuits
• Manufacturer: ETC-unknow

TELEFUNKEN Semiconductors
Rev. A4, 26-Mar-96
Pin Description TOIM3232
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
VCC_SD
TD_LED
RD_LED
RD_232
TD_232
Symbol
RESET
TD_IR
RD_IR
BR/D
GND
V
NC
X1
X2
S1
S2
CC
Resets all internal registers. Initially must be HIGH (“1”) to reset internal
registers. When HIGH, the TOIM3232 sets the IrDA default bit rate of
9600 b/s, sets pulse width to 1.627
power-saving mode. When RESET turns to LOW, the TOIM3232 exits
power-saving mode, and sets the baud rate and 1.627
mode. In the application, the RESET pin can be controlled by either the
RTS or DTR line through RS232 level converter. Minimum hold time for
reset is 1
Baud Rate control / Data
When BR/D = 0, RD_232 data is transmitted to the IrDA transmitter pin
TD_IR, while RD_IR is routed to the transmitter pin TD_232.
When BR/D = 1, data received from the RS232 port is interpreted as the
control word. The control word programs the baud rate and pulse width of
TD_IR signal. The new baud rate and pulse width will be effective as
soon as BR/D returns to LOW.
Data output of stretched signal to the RS232 port (using level converter);
received signal
Data input from the RS232 port (passing the level converter); signal to be
transmitted
V
transceiver (e.g. TFDS3000). Output polarity: Inverted RESET input.
Crystal input clock 3.6864 MHz
Crystal input clock
Ground in common with the RS232 port and IrDA transceiver ground
Transmit LED indicator driver. Use 270
series to LED to connect to V
Receive LED indicator driver. Use 270
series to LED to connect to V
No connection
User-programmable output. Can be used to turn a front end infrared trans-
ceiver ON/OFF (e.g. an infrared module at the adapter front).
User-programmable output. Can be used to turn a front end infrared trans-
ceiver ON/OFF (e.g. an infrared module at the adapter back).
Data output of shortened signal to the infrared transceiver TFDS3000
Data input from the infrared transceiver TFDS3000
Supply voltage
CC
shut-down output function. This pin can be used to shut down a
m
s.
Preliminary Information
CC
CC
(V
(V
Function
m
CC
CC
s. Then the TOIM3232 enters the
= 5 V).
= 5 V).
W
W
current limiting resistor in
current limiting resistor in
TOIM3000/3232
m
s pulse width
I/Q
O
O
O
O
O
O
O
I
I
I
I
I
I
I
Active
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
LOW
LOW
LOW
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