toim3232 ETC-unknow, toim3232 Datasheet - Page 7

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

TELEFUNKEN Semiconductors
Rev. A4, 26-Mar-96
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-
Software Algorithm
***)
STEP RESET
1
2
3
4
5
For programming the UART, refer to the National Semiconductor’s data sheet of PC 16550 UART.
HIGH
LOW
LOW
LOW
LOW
HIGH
HIGH
BR/D
LOW
X
X
RD_UART TD_UART RD_IR
for 3/16 bit
with Y = 1
1.627
DATA
length
Y = 0
YZ
for
X
X
X
Preliminary Information
m
s
DATA
X
X
X
X
DATA
gramming must be identical with the formerly
programmed data rate, or after resetting the TOIM3232,
the default rate of 9600 bit/s is used.
X
X
X
X
TD_IR
DATA
X
X
X
X
TOIM3000/3232
Resets all internal registers. Resets
IrDA default baud rate of 9600 bit/s.
Wait at least 7
Wait at least 7
The TOIM3232 now enters the con-
trol word (programming) mode.
Sending the control word YZ.
Send ‘1Z’ if 1.627
used. Otherwise send ‘0Z’ if 3/16 bit
pulses are used. ‘Y6’ keeps the 9.6
kbit/s data rate, whereas the ’0Z’
selects the 3/16 bit time pulses.
Z = 0 sets to 115.2 kbit/s. Then wait
at least 1
Data communication between the
TOIM3232 and the RS232 port has
been established by BR/D LOW. The
TOIM3232 now enters the data
transmission mode. Both RESET
and BR/D must be kept LOW (‘0’)
during data mode. Software can re-
program a new data rate by re-start-
ing from step 3. The UART also
must be set to the correct data rate
***).
m
s for hold-time.
COMMENTS
m
m
s.
s.
m
s pulses are
7 (9)