HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 813
HD6417712BPV
Manufacturer Part Number
HD6417712BPV
Description
MPU 1.5/3.3V 0K PB-FREE 256-BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH Ethernetr
Datasheet
1.HD6417712BPV.pdf
(980 pages)
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
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417712BPV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 19 Ethernet Controller Direct Memory Access Controller (E-DMAC)
19.3.3
Reception
When 1 is written to the receive request bit (RR) in the E-DMAC receive request register
(EDRRR) while the RE bit in ECMR is set to 1, the E-DMAC reads the descriptor following the
previously used descriptor from the receive descriptor list (or the descriptor indicated by the
receive descriptor start address register (RDLAR) at the initial start time) then enters the receive
standby state. When the EtherC receives a frame for this LSI (with an address enabled for
reception by this LSI), the EtherC stores the receive data in the receive FIFO. The receive data is
transferred to the receive buffer specified by RD2 according to the receive descriptor with the
RACT bit set to 1 (valid). If the data length of a received frame is longer than the buffer length
specified by RD1, the E-DMAC performs a write-back operation to the descriptor (with RFP set to
10 or 00) when the buffer becomes full, then reads the next descriptor. The E-DMAC then
continues to transfer data to the receive buffer specified by the new RD2. When frame reception is
completed, or if frame reception is suspended because of a certain kind of error, the E-DMAC
performs write-back to the relevant descriptor (with RFP set to 11 or 01), and then ends the
receive processing. The E-DMAC then reads the next descriptor and enters the receive standby
state again.
To receive frames continuously, the receive enable control bit (RNC) must be set to 1 in the
receive method control register (RMCR). The initial value is 0.
Rev. 1.00 Dec. 27, 2005 Page 769 of 932
REJ09B0269-0100
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