TOIM3000/3232

TELEFUNKEN Semiconductors

Rev. A4, 26-Mar-96

Preliminary Information

2 (9)

Pin Description TOIM3000

Pin

Symbol

Function

I/Q

Active

1

RESET

Resets all internal registers. Initially must be HIGH to reset internal regis-

ters. When LOW, the TOIM3000 connects the UART with IrDA trans-

ceiver. Data received from the UART transmits out through the infrared

transmitter. Data received from the infrared receiver is routed to the

UART. When HIGH, the TOIM3000 connects the UART with the RS232

port. Data received from the UART transmits out through the RS232 port,

while data received from the RS232 port is routed to the UART. Minimum

hold time for reset is 1

ms.

I

2

RD_UART

Received data to the UART

O

LOW

3

TD_UART

Data fom the UART to be transmitted

I

LOW

4

B_CLK

16 times baud rate clock, input from the UART (Baudout)

I

5

XIN

Oscillator input, 1.8432 MHz clock (to be connected to Xout pin of the

UART)

I

6

NC

No connection

7

NC

No connection

8

GND

Ground in common with the UART and RS232 port

9

S0

Must be connected to GND

10

S1

Must be connected to GND for output pulse length of 1.627

ms,

11

RD_232

Data input from the RS232 port, RXD pin

I

LOW

12

TD_232

Data output to the RS232 port, TXD pin

O

LOW

13

NC

No connection

14

TD_IR

Data output to infrared transmitter TFDS3000

O

HIGH

15

RD_IR

Data receive input from the infrared transmitter TFDS3000

I

LOW

16

Supply voltage

*)

The use of a pulse length of 3/16 of bit duration is not recommended when both clocks, Xout and Baudout,

of the UART are available