MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 161
MC68HC908AP16CFA
Manufacturer Part Number
MC68HC908AP16CFA
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AP16CFA.pdf
(440 pages)
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10.3.5 Commands
MC68HC908AP Family — Rev. 2.5
MOTOROLA
NOTE:
Table 10-3
baud rate of 9600 BPS. Other standard baud rates can be accomplished
using proportionally higher or lower frequency generators. If using a
crystal as the clock source, be aware of the upper frequency limit that the
internal clock module can handle.
The monitor ROM firmware uses these commands:
The monitor ROM firmware echoes each received byte back to the PTA0
pin for error checking. An 11-bit delay at the end of each command
allows the host to send a break character to cancel the command. A
delay of two bit times occurs before each echo and before READ,
IREAD, or READSP data is returned. The data returned by a read
command appears after the echo of the last byte of the command.
Wait one bit time after each echo before sending the next byte.
•
•
•
•
•
•
Freescale Semiconductor, Inc.
4.9152 MHz
9.8304 MHz
9.8304 MHz
Frequency
32.768 kHz
For More Information On This Product,
External
READSP (read stack pointer)
READ (read memory)
WRITE (write memory)
IREAD (indexed read)
IWRITE (indexed write)
RUN (run user program)
lists external frequencies required to achieve a standard
Go to: www.freescale.com
Table 10-3. Monitor Baud Rate Selection
IRQ1
V
V
V
V
TST
TST
DD
SS
PTB0
0
1
X
X
2.4576 MHz
2.4576 MHz
2.4576 MHz
2.4576 MHz
Frequency
Internal
Functional Description
Monitor ROM (MON)
Baud Rate
(BPS)
9600
9600
9600
9600
Data Sheet
161
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