1753, Shimonumabe, Nakahara-ku, Kawasaki-shi, Kanagawa 211-8668 Japan
Renesas Electronics Corporation
Product
Category
Title
MPU/MCU
The error correction and notes about receive
processing of multi-buffer frame of Gigabit Ethernet
Controller
RENESAS TECHNICAL UPDATE
Document
No.
Information
Category
Date:
Jan.
31,
2014
TN-770-A146A/E
Rev.
1.00
Technical Notification
Lot No.
Applicable
Product
SH7763 Group
All
Reference
Document
SH7763
User’sManual: Hardware
(R01UH0349EJ0300)
We would like to inform you of the error correction and notes about receive processing of multi-buffer frame of Gigabit
Ethernet Controller.
1. Description of the RMSA0 bit is corrected
Page 858 of 1982
Description of the RMSA0 bit in the Receive/Relay Function Set Register (Port 0) (TSU_FWSL0) is corrected as follows.
[Error]
Sets the processing method
when the SA (sourceaddress) of a frame received from port 0 is not registered in the entry table.
0: Frame is
not received
1: Frame is received
[Correction]
Sets the processing method
of a frame received from port 0.
0: Frame is
received according to setup of the CAM function.
1: Frame is received
regardless of setup of the CAM function.
2. Description of the RMSA1 bit is corrected
Page 860 of 1982
Description of the RMSA1 bit in the Receive/Relay Function Set Register (Port 1) (TSU_FWSL1) is corrected as follows.
[Error]
Sets the processing method
when the SA (sourceaddress) of a frame received from port 1 is not registered in the entry table.
0: Frame is
not received
1: Frame is received
[Correction]
Sets the processing method
of a frame received from port 1.
0: Frame is
received according to setup of the CAM function.
1: Frame is received
regardless of setup of the CAM function.
(c) 2013. Renesas Electronics Corporation. All rights reserved.
Page 1 of 2
RENESAS TECHNICAL UPDATE TN-770-A146A/E
3. Notes about receive processing of multi-buffer frame (single-frame/multi-descriptor).
[Notice]
Date:
January 31,
2014
When the receive descriptor is newly added after the receive descriptor empty and DMA transfer of a receiving frame is
resumed, it becomes impossible to perform DMA transfer normally in receive processing of multi-buffer frame
(single-frame/multi-descriptor).
Please perform the following workaround or use all receive data of one frame in a one receive
buffer(single-frame/single-descriptor) in receive processing.
[Occurring Conditions]
When the receive descriptor is empty in receive processing of multi-buffer frame (single-frame/multi-descriptor).
[Workaround]
When using receive processing of multi-buffer frame (single-frame/multi-descriptor), please perform as either of following.
(1) Don’t empty the receive descriptor.
(2) When the receive descriptor is empty, execute a software reset by means of the SWRT and SWRR bits in the
E-DMAC mode register (EDMR).
Page 2 of 2
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