TOIM3232 查看數據表（PDF） - Vishay Semiconductors
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TOIM3232 Datasheet PDF : 9 Pages
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TOIM3232
Vishay Telefunken
Not for new designs
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
programming 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
Step
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2
3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 4
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 5
RESET
HIGH
LOW
LOW
LOW
LOW
BR/D
X
X
HIGH
HIGH
LOW
RD_UART TD_UART RD_IR
X
X
X
X
X
X
X
X
X
YZ
with Y = 1
for
1.627 ms
Y=0
for 3/16 bit
length
DATA
X
DATA
X
DATA
TD_IR
X
X
X
X
DATA
Comments
Resets all internal registers. Resets
IrDA default data rate of 9600 bit/s.
Wait at least 7 ms.
Wait at least 7 ms.
The TOIM3232 now enters the
Control Word (programming) mode.
Sending the Control Word YZ.
Send ‘1Z’ if 1.627 ms pulses are
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 length pulses.
Z = 0 sets to 115.2 kbit/s. Wait at
least 1 ms for hold-time.
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
reprogram a new data rate by
restarting from step 3.
The UART also must be set to the
correct data rate *).
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ *) For programming the UART, refer to e.g., National Semiconductor’s data sheet of PC 16550 UART.
www.vishay.com
4 (9)
Document Number 82521
Rev. A1.1, 02-Apr-01
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