MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 186

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Communications Interface (SCI)
Technical Data
186
The maximum percent difference between the receiver count and the
transmitter count of a slow 9-bit character with no errors is
Fast Data Tolerance
Figure 11-8
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.
For an 8-bit character, data sampling of the stop bit takes the receiver
9 bit times × 16 RT cycles + 10 RT cycles = 154 RT cycles.
With the misaligned character shown in
154 RT cycles at the point when the count of the transmitting device is
10 bit times × 16 RT cycles = 160 RT cycles.
The maximum percent difference between the receiver count and the
transmitter count of a fast 8-bit character with no errors is
For a 9-bit character, data sampling of the stop bit takes the receiver
10 bit times × 16 RT cycles + 10 RT cycles = 170 RT cycles.
With the misaligned character shown in
170 RT cycles at the point when the count of the transmitting device is
11 bit times × 16 RT cycles = 176 RT cycles.
RECEIVER
RT CLOCK
Freescale Semiconductor, Inc.
For More Information On This Product,
Serial Communications Interface (SCI)
Go to: www.freescale.com
shows how much a fast received character can be
170 163
------------------------- -
154 160
------------------------- -
Figure 11-8. Fast Data
STOP
170
154
–
–
×
×
100
100
SAMPLES
DATA
Figure
Figure
=
=
4.12%
3.90%
IDLE OR NEXT CHARACTER
·
11-8, the receiver counts
11-8, the receiver counts
MC68HC908JL8
MOTOROLA
—
Rev. 2.0