EasyManuals Logo

NXP Semiconductors MPC5566 User Manual

NXP Semiconductors MPC5566
1268 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #1026 background imageLoading...
Page #1026 background image
Enhanced Serial Communication Interface (eSCI)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 21-29
21.4.5.5.1 Slow Data Tolerance
Figure 21-19 shows how much a slow received frame can be misaligned 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.
Figure 21-19. Slow Data
For an 8-bit data character, data sampling of the stop bit takes the receiver RT clock 151 clock cycles, as
is shown below:
With the misaligned character shown in Figure 21-19, the receiver counts 151 RT cycles at the point when
the count of the transmitting device is 9 bit times x 16 RT cycles = 147 RT cycles.
The maximum percent difference between the receiver count and the transmitter count of a slow 8-bit data
character with no errors is 4.63%, as is shown below:
For a 9-bit data character, data sampling of the stop bit takes the receiver 167 RT cycles, as is shown below:
With the misaligned character shown in Figure 21-19, the receiver counts 167 RT cycles at the point when
the count of the transmitting device is 10 bit times x 16 RT cycles = 160 RT cycles.
The maximum percent difference between the receiver count and the transmitter count of a slow 9-bit
character with no errors is 4.19%, as is shown below:
RT1
Receiver
RT clock
RT2 RT3 RT4 RT5 RT6 RT7 RT8 RT9 RT10 RT11 RT12 RT13 RT14 RT15 RT16
MSB STOP
Data samples
9 bit times 16 RT cycles 7 RT cycles+× 151 RT cycles=
151 – 144
151
--------------------------
100× 4.63%=
10 bit times 16 RT cycles 7 RT cycles+× 167 RT cycles =
167 – 160
167
--------------------------
100× 4.19%=

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the NXP Semiconductors MPC5566 and is the answer not in the manual?

NXP Semiconductors MPC5566 Specifications

General IconGeneral
BrandNXP Semiconductors
ModelMPC5566
CategoryMicrocontrollers
LanguageEnglish

Related product manuals