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Monitor ROM (MON)
10.4.6 Baud Rate
Technical Data
166
Table 10-8. RUN (Run User Program) Command
Description
Executes RTI instruction
Operand
None
Data
None
Returned
Opcode
$28
With a 4.9152-MHz crystal and the PTC3 pin at logic 1 during reset, data
is transferred between the monitor and host at 4800 baud. If the PTC3
pin is at logic 0 during reset, the monitor baud rate is 9600. When the
CGM output, CGMOUT, is driven by the PLL, the baud rate is
determined by the MUL[7:4] bits in the PLL programming register (PPG).
(See
Section 9. Clock Generator Module
Table 10-9. Monitor Baud Rate Selection
Monitor
Baud Rate
1
4.9152 MHz
4800
4.194 MHz
4096
Monitor ROM (MON)
Command Sequence
SENT TO
MONITOR
RUN
RUN
ECHO
(CGM).)
VCO Frequency Multiplier (N)
2
3
9600
14,400
19,200
8192
12,288
16,384
MC68HC908AB32
4
5
6
24,000
28,800
20,480
24,576
Rev. 1.0
—
MOTOROLA
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