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부품번호 TOIM3232 기능
기능 Infrared IrDA Integrated Interface Circuits
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TOIM3232 데이터시트, 핀배열, 회로
TOIM3000/3232
Infrared IrDA Integrated Interface Circuits
ULC-Technology: High-performance gate array package using dual metal layer CMOS technology, featuring
sub-micronic channel length (0.8 mm)
Description
The TOIM3xxx series ICs provide proper timing for the
front end infrared transceiver TFDS3000, as specified by
the IrDA standard. In the transmit mode, the TOIM3xxx
provides IrDA-compatible electrical pulses to the in-
frared transceiver TFDS3000 on logic LOW electrical
input. In the receive mode, the TOIM3xxx stretches re-
ceived infrared pulses to the proper bit width at the
operating bit rate. The IrDA bit rate varies from 2.4 to
115.2 kbit/s.
D For the UART interface, the TOIM3000 uses the
1.8432 MHz clock input as the fast clock and the baud
clock output from the UART to do the pulse stretching
and shortening. The baud clock is 16 times the baud
rate. The output pulses are fixed at 1.627 ms or 3/16 of
bit time.
D For the RS232 interface, the TOIM3232 uses an exter-
nal crystal clock 3.6864 MHz for its pulse stretching
and shortening. The TOIM3232 is programmable to
operate from 1200 bit/s to 115.2 kbit/s by the commu-
nication software through the RS232 port. Output
pulses are software-programmable as either 1.627 ms
or 3/16 of bit time.
The typical power consumption of both circuits is very
low with about 10 mW in operational state. It is in the or-
der of magnitude of microwatts in standby mode.
Features
TOIM3000
D Pulse shaping function (shortening and stretching)
used in infrared IrDA standard applications
D Directly interfaces the infrared transceiver
TFDS3000*) to a UART or a microcontroller
D 3 V and 5 V operation with low operating current
D SO16L package
*) TFDS3000 is an infrared IrDA transceiver made by TEMIC
Block Diagrams
TOIM3232
D Pulse shaping function (shortening and stretching)
used in infrared IrDA standard applications
D Directly interfaces the infrared transceiver
TFDS3000*) to an RS232 port
D Programmable baud clock generator
(1200 Hz 115 kHz), 13 baud rates
D 3 V and 5 V operation
D SO16L package
XIN
B_CLK
VCC
Pulse
shaper
TD_UART
RD_UART
RESET
TOIM3000
GND
TD_IR
RD_IR
TD_232
RD_232
TD_232
RD_232
BR/D
RESET
VCC
Pulse
shaper
Baud
clock
generator
TD_IR
RD_IR
TD_LED
RD_LED
S1
S2
TOIM3232
GND X1
X2
3.6864 MHz
TELEFUNKEN Semiconductors
Rev. A4, 26-Mar-96
Preliminary Information
1 (9)




TOIM3232 pdf, 반도체, 판매, 대치품
TOIM3000/3232
Application
VCC
UART
OUT1
SIN
SOUT
VCC
RESET TOIM3000
RD_UART RD_IR
TD_UART TD_IR
R1
R2 C1, C2
83
SD
TFDS
RXD
3000
TXD
XOUT
BAUDOUT
XIN
B_CLK
S0 S1
TD_232
RD_232
TXD
RXD
RS232
Figure 1. TOIM3000 – UART interface
(built-in infrared port)
RS232
9–pin
connector
Level
converter
pin 4, DTR
pin 7, RTS
pin 3, TXD
pin 2, RXD
TOIM3232
RESET
BR/D
VCC_SD
TD_UART
RD_UART
TD_IR
RD_IR
TFDS3000
VCC
TXD
RXD
X1 X2
3.6842 MHz
Figure 2. TOIM3232 – RS232 port interface
(external infrared adapter)
Figure 1 shows a typical example of a UART interface.
As shown, XIN accepts the 1.8432 MHz input clock, and
B_CLK accepts the 16 times baud rate clock.
Set S1 = S0 = LOW (“0”). When RESET = 0, the
TOIM3000 sends the data to, or receives the data from the
infrared transceiver TFDS3000. If Reset is active,
RESET = 1, the TOIM3000 handles the normal electrical
data exchange with the RS232 port.
WR1 = 2.2 k optional (only necessary when RxD–RD IR
line is capacitive loaded).
R2 = 100 W, R3 = 10 W, C1 = 6.8 mF and C2 = 0.1 mF. C1
and C2 are in parallel (VCC = 5 V, in case of 3 V supply,
value of R3 should be reduced, see introductory text).
Single clock operation
TOIM3000 can be operated with only a single clock. In
this case, B_CLK and XIN are tight together and con-
nected to the Baudout pin of the UART. The pulse width
is then shortened to 3/16 of the bit length and noise filter-
ing is deactivated. S1 should be connected to VCC and SO
to GND.
Figure 2 shows a typical example of an RS232 port inter-
face. The TOIM3232 interfaces the RS232 port to an
infrared transceiver. Due to the various voltage levels, an
additional level converter (discrete or integrated) is nec-
sessary. The baud rate generator is programmable. A
description of programming is given in the Chapter “Soft-
ware for the TOIM3232” page 7 (IrDA Design Guide).
When BR/D = 0, the TOIM3232 interprets RD_232 data
as data transmitted to the TFDS3000. On the other hand,
whenever BR/D = 1, the TOIM3232 interprets RD_232
as the control word. The baud rate can be programmed to
operate from 1200 bit/s to 115 kbit/s. As RS232 level
converter, EIA232 or MAX232 or equivalent should be
used.
The external resistors and capacitors needed are shown in
figure 1. Please also refer to figure 1 for the recom-
mended power supply filter and pull-up resistors.
The output pulse length can be programmed, see chapter
“Operation Description”. It is strongly recommended to
muse 1.627 s output pulses to save battery power.
4 (9) TELEFUNKEN Semiconductors
Preliminary Information
Rev. A4, 26-Mar-96

4페이지










TOIM3232 전자부품, 판매, 대치품
TOIM3000/3232
Software for the TOIM3232
The control word is composed of two characters, written in hexadecimal, in format:YZ.
UART Programming
For proper operation, the RS232 must be programmed to
send a START bit plus an 8 bit data word, YZ and no
STOP bit for every word sent. The transfer rate for pro-
gramming must be identical with the formerly
programmed data rate, or after resetting the TOIM3232,
the default rate of 9600 bit/s is used.
Software Algorithm
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSTEP RESET BR/D RD_UART TD_UART RD_IR TD_IR
COMMENTS
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1 HIGH X
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ2 LOW X
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ3 LOW HIGH
X
X
X
X X X Resets all internal registers. Resets
IrDA default baud rate of 9600 bit/s.
X X X Wait at least 7 ms.
X X X Wait at least 7 ms.
The TOIM3232 now enters the con-
trol word (programming) mode.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ4 LOW HIGH
YZ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁwith Y = 1
X
X X Sending the control word YZ.
Send ‘1Z’ if 1.627 ms pulses are
for
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ1.627 ms
used. Otherwise send ‘0Z’ if 3/16 bit
pulses are used. ‘Y6’ keeps the 9.6
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁY = 0
kbit/s data rate, whereas the ’0Z’
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁfor 3/16 bit
selects the 3/16 bit time pulses.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁlength
Z = 0 sets to 115.2 kbit/s. Then wait
at least 1 ms for hold-time.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ5 LOW LOW DATA
DATA DATA DATA Data communication between the
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁTOIM3232 and the RS232 port has
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁbeen established by BR/D LOW. The
TOIM3232 now enters the data
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁtransmission mode. Both RESET
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁand BR/D must be kept LOW (‘0’)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁduring data mode. Software can re-
program a new data rate by re-start-
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁing from step 3. The UART also
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁmust be set to the correct data rate
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ***).
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ***) For programming the UART, refer to the National Semiconductor’s data sheet of PC 16550 UART.
TELEFUNKEN Semiconductors
Rev. A4, 26-Mar-96
Preliminary Information
7 (9)

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관련 데이터시트

부품번호상세설명 및 기능제조사
TOIM3232

Infrared IrDA Integrated Interface Circuits

TEMIC Semiconductors
TEMIC Semiconductors
TOIM3232

Infrared IrDA Integrated Interface Circuits

TEMIC Semiconductors
TEMIC Semiconductors

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