HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 816

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 19 Ethernet Controller Direct Memory Access Controller (E-DMAC)
(2)
If an error occurs during reception in the case of a multi-buffer frame where a receive frame is
divided for storage in multiple buffers, the E-DMAC performs the processing shown in figure
19.7.
In the figure, the invalid receive descriptors (with the RACT bit cleared to 0) represent the normal
reception of data to be stored in buffers, and the valid receive descriptors (with the RACT bit set
to 1) represent unreceived buffers. If a frame receive error occurs with a descriptor shown in the
figure, the status is written back to the corresponding descriptor.
If error interrupts are enabled in the EtherC/E-DMAC status interrupt permission register
(EESIPR), an interrupt is generated immediately after the write-back. If there is a new frame
receive request, reception is continued from the buffer after that in which the error occurred.
Rev. 1.00 Dec. 27, 2005 Page 772 of 932
REJ09B0269-0100
E-DMAC
Receive Processing in Case of Multi-Buffer Frame
Inactivates RACT and writes RFE, RFS
Descriptor read
.
.
.
.
.
.
.
.
Figure 19.7 E-DMAC Operation after Receive Error
R
A
C
T
0
0
0
1
1
1
1
1
1
R
D
E
L
0
0
0
0
0
0
0
0
1
Descritptors
R
P
F
1
1
0
0
0
0
0
0
0
0
R
P
F
0
0
0
0
0
0
0
0
0
0
Continue
Continue
Frame
type
Start
Buffer length set
by descriptor
Start of frame
New frame reception
continues from this buffer
Receive error
occurrence
Received data
Unreceived data