HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 814

• 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)
Reception flowchart
Rev. 1.00 Dec. 27, 2005 Page 770 of 932
REJ09B0269-0100
This LSI + memory
EtherC/E-DMAC
descriptor and
receive buffer
initialization
[Legend]
EtherC/E-DMAC initialization: Executes a software reset with the SWR bit in EDMR set to 1.
Receive descriptor and receive buffer setting: Sets receive descriptors and receive buffers, and sets EtherC and E-DMAC
Start of reception: Occurs when 1 is written to the RE bit in ECMR and the RR bit in EDRRR.
Receive descriptor read: The E-DMAC reads a receive descriptor.
Receive data transfer: Writes receive data from the receive FIFO to the receive buffer by using DMA transfer by the E-DMAC.
Receive descriptor write-back: The E-DMAC writes 0 to the RACT bit and writes the receive status to the receive descriptor.
Receive
setting
Receive descriptor read
Receive descriptor read
(preparation for receiving
the next frame)
Receive data transfer
Receive data transfer
Figure 19.5 Sample Reception Flowchart (Single-Frame/Two-Descriptor)
Receive descriptor
read
Start of reception
Receive descriptor
write-back
Receive descriptor
write-back
E-DMAC
Reception
completed
registers, then writes 1 to the RE bit in ECMR and the RR bit in EDRRR.
Receive FIFO
EtherC
Frame reception
Ethernet