Mitsubishi Motors DS5000TK User Manual
Page 134
USER’S GUIDE
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AUTO–BAUD RATE DETECTION
The Serial Bootstrap Loader has the capability of deter-
mining which of the six supported baud rate frequencies
is being used for communication and initializing its inter-
nal hardware for communication at that frequency.
When the Program Load mode is first invoked, the de-
vice will watch for activity on the serial port. If a
character is received at one of the six supported baud
rates, then operation in the Serial Program Load mode
will be established. The loader expects to talk asynchro-
nously at 300, 1200, 2400, 9600, 19200, or 57600 baud
using eight data bits, no parity, and one stop bit in full du-
plex. A break signal followed by a carriage return will
cause a re–determination of baud rate. Although an
11.0592 MHz crystal is standard for generating baud
rates, the auto–baud rate detector allows a variety of
crystals to be used. If a crystal frequency other than
11.0592 MHz is used, then the baud rate frequencies
which will be recognized by the serial loader are shown
in Table 16–1. Other crystals will generate non–stan-
dard band rates.
SERIAL LOADER BAUD RATES FOR DIFFERENT CRYSTAL FREQUENCIES Table 16–1
BAUD RATE
CRYSTAL FREQ (MHz)
300
1200
2400
9600
19200
57600
14.7456
Y
Y
Y
Y
11.0592
Y
Y
Y
Y
Y
Y
9.21600
Y
Y
Y
Y
7.37280
Y
Y
Y
Y
5.52960
Y
Y
Y
Y
1.84320
Y
Y
Y
Y