MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 388

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Serial Communications Interface Modules (SCI1 and SCI2)
17.12.5.1 Slow Data Tolerance
Advance Information
388
Serial Communications Interface Modules (SCI1 and SCI2)
Figure 17-23
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 8-bit data, sampling of the stop bit takes the receiver:
With the misaligned data shown in
154 RT cycles at the point when the count of the transmitting device is:
The maximum percent difference between the receiver count and the
transmitter count for slow 8-bit data with no errors is:
For 9-bit data, sampling of the stop bit takes the receiver:
With the misaligned data shown in
170 RT cycles at the point when the count of the transmitting device is:
The maximum percent difference between the receiver count and the
transmitter count for slow 9-bit data with no errors is:
Freescale Semiconductor, Inc.
RECEIVER
RT CLOCK
For More Information On This Product,
10 bit times
9 bit times
10 bit times
9 bit times
Go to: www.freescale.com
shows how much a slow received frame can be misaligned
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
154 147
------------------------- -
170 163
------------------------- -
Figure 17-23. Slow Data
154
170
–
–
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
Figure
Figure
100
100
SAMPLES
DATA
=
=
17-23, the receiver counts
17-23, the receiver counts
4.54%
4.12%
STOP
MOTOROLA