Serial Communications Interface
Technical Data
MC68HC908AB32
—
Rev. 1.0
256
Serial Communications Interface Module (SCI)
MOTOROLA
With the misaligned character shown in
, the receiver counts
170 RT cycles at the point when the count of the transmitting device is
10 bit times
×
16 RT 3 RT cycles = 163 RT cycles.
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
shows how much a fast received character can be
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.
Figure 15-8. Fast Data
For an 8-bit character, data sampling of the stop bit takes the receiver
9 bit times
×
16 RT 10 RT cycles = 154 RT cycles.
With the misaligned character shown in
, the receiver counts
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
170
163
–
170
--------------------------
100
×
4.12%
=
IDLE OR NEXT CHARACTER
STOP
RT1
RT2
RT3
RT4
RT5
RT6
RT7
RT8
RT9
RT10
RT11
RT12
RT13
RT14
RT15
RT16
DATA
SAMPLES
RECEIVER
RT CLOCK
154
160
–
154
--------------------------
100
×
3.90%
˙
=
Содержание MC68HC908AB32
Страница 1: ...MC68HC908AB32 D REV 1 0 MC68HC908AB32 HCMOS Microcontroller Unit TECHNICAL DATA ...
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Страница 68: ...FLASH Memory Technical Data MC68HC908AB32 Rev 1 0 68 FLASH Memory MOTOROLA ...
Страница 84: ...EEPROM Technical Data MC68HC908AB32 Rev 1 0 84 EEPROM MOTOROLA ...
Страница 108: ...Central Processor Unit CPU Technical Data MC68HC908AB32 Rev 1 0 108 Central Processor Unit CPU MOTOROLA ...
Страница 130: ...System Integration Module SIM Technical Data MC68HC908AB32 Rev 1 0 130 System Integration Module SIM MOTOROLA ...
Страница 338: ...Input Output I O Ports Technical Data MC68HC908AB32 Rev 1 0 338 Input Output I O Ports MOTOROLA ...
Страница 364: ...Low Voltage Inhibit LVI Technical Data MC68HC908AB32 Rev 1 0 364 Low Voltage Inhibit LVI MOTOROLA ...
Страница 386: ...Electrical Specifications Technical Data MC68HC908AB32 Rev 1 0 386 Electrical Specifications MOTOROLA ...
Страница 390: ...Ordering Information Technical Data MC68HC908AB32 Rev 1 0 390 Ordering Information MOTOROLA ...
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