MC68HC08AZ60ACFU MOTOROLA [Motorola, Inc], MC68HC08AZ60ACFU Datasheet - Page 226

• Manufacturer Part Number: MC68HC08AZ60ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Communications Interface (SCI)
Advance Information
226
Fast Data Tolerance
For an 8-bit character, data sampling of the stop bit takes the receiver
9 bit times
With the misaligned character shown in
counts 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
counts 170 RT cycles at the point when the count of the transmitting
device is 10 bit times
The maximum percent difference between the receiver count and the
transmitter count of a slow 9-bit character with no errors is
Figure 16-10
misaligned without causing a noise error or a framing error. The fast
stop bit ends at RT10 instead of RT16 but is still there for the stop bit
data samples at RT8, RT9, and RT10.
RECEIVER
RT CLOCK
Serial Communications Interface (SCI)
16 RT cycles + 10 RT cycles = 154 RT cycles.
shows how much a fast received character can be
16 RT cycles + 10 RT cycles = 170 RT cycles.
154 147
------------------------- -
170 163
------------------------- -
Figure 16-10. Fast Data
16 RT cycles + 3 RT cycles = 147 RT cycles.
154
170
16 RT cycles + 3 RT cycles = 163 RT cycles.
STOP
–
–
100
100
SAMPLES
DATA
=
=
4.54%
4.12%
Figure
Figure
MC68HC08AZ60A — Rev 0.0
IDLE OR NEXT CHARACTER
16-9, the receiver
16-9, the receiver
MOTOROLA