MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 253

• Manufacturer Part Number: MC68HC708XL36
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

19-sci_d
MOTOROLA
Slow Data Tolerance
Figure 9
without causing a noise error or a framing error. The slow stop bit begins
at RT8 instead of RT1 but arrives in time for the stop bit data samples at
RT8, RT9, and RT10.
For an 8-bit character, data sampling of the stop bit takes the receiver
9 bit times
With the misaligned character shown in
154 RT cycles at the point when the count of the transmitting device is
9 bit times
The maximum percent difference between the receiver count and the
transmitter count of a slow 8-bit character with no errors is
For a 9-bit character, data sampling of the stop bit takes the receiver
10 bit times
With the misaligned character shown in
170 RT cycles at the point when the count of the transmitting device is
10 bit times
RECEIVER
RT CLOCK
Freescale Semiconductor, Inc.
For More Information On This Product,
shows how much a slow received character can be misaligned
Go to: www.freescale.com
16 RT cycles + 10 RT cycles = 154 RT cycles.
16 RT cycles + 3 RT cycles = 147 RT cycles.
16 RT cycles + 10 RT cycles = 170 RT cycles.
16 RT cycles + 3 RT cycles = 163 RT cycles.
MSB
SCI
154 147
------------------------- -
Figure 9. Slow Data
154
–
100
SAMPLES
DATA
Figure
Figure
=
4.54%
9, the receiver counts
9, the receiver counts
STOP
Functional Description
MC68HC708XL36
SCI
253