UPD70F3786GJ-GAE-AX Renesas Electronics America, UPD70F3786GJ-GAE-AX Datasheet - Page 1480

• Manufacturer Part Number: UPD70F3786GJ-GAE-AX
• Description: MCU 32BIT V850ES/JX3-E 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Er

Specifications of UPD70F3786GJ-GAE-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: CAN, CSI, EBI/EMI, Ethernet, I²C, UART/USART, USB
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 100
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 124K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

23.5 MAC/FIFO/DMAC Function
23.5.1 Frame format
1478
With Ethernet/IEEE802.3, information is transmitted or received in the form of a packet or a frame.
The Ethernet controller supports the following three types of frames.
• Basic frames
• VLAN frames
• Pause control frames
(1) Basic frames
Preamble
The basic frame used with Ethernet consists of a preamble, frame start delimiter (SFD), destination address
(DA), source address (SA), type/length field (TYPE/LEN), data field (DATA), and frame check sequence (FCS).
The packet size is defined to be 64 bytes minimum and 1,518 bytes maximum, excluding the preamble (PA)
and frame start delimiter (SFD).
(a) Preamble and frame start delimiter (SFD)
(b) Destination address (DA)
(c) Source address (SA)
(d) Type/length field
(e) Data field
7 bytes
The preamble and SFD consist of a repetition of 10 for 62 bits following by 11 at the end, and indicate the
header of each frame.
The destination address field indicates the destination MAC address. A unicast address, multicast address,
or broadcast address is written to this field.
The source MAC address is written to this field.
As an Ethernet frame, this field is a type field that indicates a protocol type.
As an IEEE802.3 frame, this field is a length field that indicates the length of the data field.
The data field size ranges from 46 bytes to 1,500 bytes.
Depending on the communication protocol, the data field may be divided and special header information
inserted.
Redundancy Check) for the FCS and does not check its contents.
1 byte
SFD
The Ethernet controller uses the data in this field only for calculating the CRC (Cycle
6 bytes
DA
CHAPTER 23 ETHERNET CONTROLLER
Figure 23-3. Basic Frame Structure
User’s Manual U19601EJ2V0UD
6 bytes
SA
Frame
2 bytes
TYPE/
LEN
Packet
46 to 1,500 bytes
DATA+PAD
4 bytes
FCS