W7100A WIZnet, W7100A Datasheet - Page 134

• Manufacturer Part Number: W7100A
• Description: 8-bit Microcontrollers - MCU 8051 CORE+HARDWIRED TCP/IP+MAC+PHY
• Manufacturer: WIZnet

Specifications of W7100A

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 25 MHz
• Program Memory Size: 255 B
• Data Ram Size: 64 KB
• On-chip Adc: No
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 80 C
• Package / Case: LQFP-100
• Mounting Style: SMD/SMT
• Interface Type: UART
• Program Memory Type: Flash

© Copyright 2011 WIZnet Co., Inc. All rights reserved.

Process the MACRAW data of the SOCKET which received it in internal RX memory. The
structure of the MACRAW data is as
The MACRAW data consists of ‘PACKET-INFO’, ‘DATA packet’ and 4bytes CRC. The ‘PACKET-
INFO’ is the length of the DATA packet. The ‘DATA packet’ consists of 6bytes ‘Destination MAC
address’, 6bytes ‘Source MAC address’ and 2bytes ‘Type’, 46~1500 bytes ‘Payload’. The
‘Payload’ of DATA packet consists of Internet protocol such as ARP, IP according to the ‘Type’.
The details of ‘Type’ please refer to the web:
(
{
U
http://www.iana.org/assignments/ethernet-numbers
src_mask = S0_RX_RD & gS0_RX_MASK;
/* calculate start address(physical address) */
src_ptr = gS0_RX_BASE + src_mask;
len = get_Byte_sizeof_DATA_packet();
/* if overflow SOCKET RX memory */
If((src_mask + len) > (gS0_RX_MASK + 1))
{
}
else
{
}
/* increase Sn_RX_RD as length of len */
/* get the size of packet */
/* calculate offset address */
upper_size = (gS0_RX_MASK + 1) – src_mask;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), upper_size);
/* update destination_address */
destination_address += upper_size;
/* copy left_size bytes of gSn_RX_BASE to destination_address */
left_size = len – upper_size;
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), left_size);
wizmemcpy((0xFE0000 + src_ptr), (0x000000 + destination_address), len);
/* copy upper_size bytes of get_start_address to destination_address */
/* copy len bytes of src_ptr to destination_address */
Receiving process
Figure 9.10 The received MACRAW data format
below:
// src_ptr is physical start address
// Read the 2bytes PACKET-INFO
// src_mask is offset address
U
)
Ver. 1.12
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