Timing Diaram Of Transmission Data When An Error Is Generated; Figure 13.5.5A Error Happened On The Slave Side When Master Transmission - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

13.5 Operation

13.5.5 Timing diaram of transmission data when an error is generated

1. The following is an example when the master transmission, an error is generated at the second byte
data on the slave side. NAK is received by the master. the following data is transmitted at the second
frame.
Tele. Length
<Trans. Side>
Transmission completed as the figure became maximum
COM
Trans. Buffer
WDBC
DEER
Set 3 bytes transmission in DEWR
DEWR
Write
DEWR
<Recep. Side>
COM
RDB
DEER

Figure 13.5.5a Error happened on the Slave side when master transmission

188 Chapter 13: IE Bus
Re-transmit until the figure becomes
the maximum transmission byte
Data2(01H) Data2(01H) .... Data2(01H)
Data1(00H)
01H
00H
Clear WDB and write data in WDB from the second byte
03H
03H
Set 3 bytes transmission
Transmission completed
due to an error
XXH
03H
Reception by Tele.
Lengh byte
02H
Transmit the rest of 2 bytes
02H
Read DERR and
Set DERR's value
write the value
00H
02H
Necessity to receive
the rest of 2 bytes
Header Data Filed
Tele. Length Data2(01H) Data3 (02H)
01H 02H
02H
Transmits the all data normally
02H
The seoond bytee error
and will not be set in RDB
02H
Transmits the all
Reception by Tele.
data normally
Lengh byte
DEWR's value is set
00H
01H 02H
00H
MB90580 Series