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PD72042B Datasheet(PDF) 55 Page - Renesas Technology Corp

Part No. PD72042B
Description  LSI DEVICE FOR Inter Equipment BusTM (IEBusTM) PROTOCOL CONTROL
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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PD72042B Datasheet(HTML) 55 Page - Renesas Technology Corp

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µPD72042B
53
Data Sheet S13990EJ3V0DS
Table 4-9 indicates the SLRC return code issued in broadcast reception when an optional function is set in the
CMR register with DERC = 1.
Table 4-9
SLRC Return Code in Broadcast Reception When the Optional Function Is Set (DERC = 1)
SLRC
Description
1100
1. Meaning: Broadcast reception error
2. Occurrence condition: This return code is issued if RBF is not ready for receptionNote when the
control field is received. In this case, the master address in the communication frame is set as a
broadcast address in DAR2 and DAR1.
3. Microcomputer processing: A broadcast address can be read from DAR1 and DAR2. However, the
data of DAR1 and DAR2 is updated each time a broadcast reception error occurs. So, ensure that data
is read from DAR1 and DAR2 within the interval indicated below.
• Read time:
Approx. 5420
µs (mode 0)
Approx. 1490
µs (mode 1)
Note
RBF is ready for reception according to the optional function setting in CMR, as described below.
(i) When MFC = 0
The SLRE flag of the FLG register is 1 (slave reception and broadcast reception only); and
RBF is empty.
(ii) When MFC = 1
The SLRE flag of the FLG register is 1 (slave reception and broadcast reception only); and
RBF has at least 4 bytes of free space.
When RBF is ready for reception, bit 1 of slave status transmitted from the master unit with control bits 0000 or
0110 is set to 0.


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