W7100A WIZnet, W7100A Datasheet - Page 137

• 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.
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memory and default MTU. The host generates the MACRAW data in the same format as the
“Receiving process” data packet, and transmits it. At this time, if the size of the generated
data is smaller than 60bytes, the transmitted Ethernet packet internally fills to 60bytes by
“Zero padding” and then it is transmitted.
{/* first, get the free TX memory size */
FREESIZE:
}
}
The size of the data which the user wants to transmit cannot be larger than the internal TX
freesize = S0_TX_FSR;
if (freesize < send_size) goto FREESIZE;
/* calculate offset address */
dst_mask = Sn_TX_WR & gSn_TX_MASK;
/* calculate start address(physical address) */
dst_ptr = gSn_TX_BASE + dst_mask;
/* if overflow SOCKET TX memory */
if ( (dst_mask + len) > (gSn_TX_MASK + 1) )
{/* copy upper_size bytes of source_addr to dst_ptr */
}
else
{/* copy len bytes of source_addr to dst_ptr */
}
/* increase Sn_TX_WR as length of len */
S0_TX_WR += send_size;
/* set SEND command */
S0_CR = SEND;
}
Check send data / Sending process
upper_size = (gSn_TX_MASK + 1) – dst_mask;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), upper_size);
/* update source_addr*/
source_addr += upper_size;
/* copy left_size bytes of source_addr to gSn_TX_BASE */
left_size = len – upper_size;
wizmemcpy((0x000000 + source_addr), (0xFE0000 + gS0_TX_BASE), left_size);
wizmemcpy((0x000000 + source_addr), (0xFE0000 + dst_ptr), len);
// dst_ptr is physical start address
// dst_mask is offset address
Ver. 1.12
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