TOIM3232 Ver la hoja de datos (PDF) - Temic Semiconductors
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TOIM3232 Datasheet PDF : 9 Pages
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TOIM3000/3232
Pin Description TOIM3232
Pin Symbol
Function
1
RESET 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 ms. Then the TOIM3232 enters the
power-saving mode. When RESET turns to LOW, the TOIM3232 exits
power-saving mode, and sets the baud rate and 1.627 ms pulse width
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 ms.
2
BR/D 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.
3 RD_232 Data output of stretched signal to the RS232 port (using level converter);
received signal
4
TD_232 Data input from the RS232 port (passing the level converter); signal to be
transmitted
5 VCC_SD VCC shut-down output function. This pin can be used to shut down a
transceiver (e.g. TFDS3000). Output polarity: Inverted RESET input.
6
X1 Crystal input clock 3.6864 MHz
7
X2 Crystal input clock
8
GND Ground in common with the RS232 port and IrDA transceiver ground
9
W TD_LED Transmit LED indicator driver. Use 270 current limiting resistor in
series to LED to connect to VCC (VCC = 5 V).
W 10 RD_LED Receive LED indicator driver. Use 270 current limiting resistor in
series to LED to connect to VCC (VCC = 5 V).
11
NC No connection
12
S1
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).
13
S2
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).
14
TD_IR Data output of shortened signal to the infrared transceiver TFDS3000
15 RD_IR Data input from the infrared transceiver TFDS3000
16
VCC Supply voltage
I/Q Active
I HIGH
I
O HIGH
I HIGH
O LOW
I
I
O LOW
O LOW
O LOW
O LOW
O HIGH
I LOW
I
TELEFUNKEN Semiconductors
3 (9)
Rev. A4, 26-Mar-96
Preliminary Information
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