參數(shù)資料
型號(hào)： DS80C400-FNY
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 71/97頁(yè)
文件大小： 0K
描述： IC MCU 75MHZ 16MB HP 100-LQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
產(chǎn)品變化通告： Product Discontinuation 20/Feb/2012
標(biāo)準(zhǔn)包裝： 90
系列： 80C
核心處理器： 8051
芯體尺寸： 8-位
速度： 75MHz
連通性： 1 線，CAN，EBI/EMI，以太網(wǎng)，SIO，UART/USART
外圍設(shè)備： 電源故障復(fù)位，WDT
輸入/輸出數(shù)： 64
程序存儲(chǔ)器容量： 64KB（64K x 8）
程序存儲(chǔ)器類型： ROM
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 1.62 V ~ 3.6 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 100-LQFP
包裝： 托盤
配用： DS80C400-KIT#-ND - EVAL KIT FOR DS80C400
DS80C400 Network Microcontroller
73 of 97
Figure 14. NetBoot Code Flow Chart
Next, the DS80C400 ROM searches the 1-Wire bus for an external device (separate from the device containing the
MAC address) that contains an IP address and TFTP server IP address. In order to correctly acquire the IP and
TFTP server addresses from an external 1-Wire device, the data read from the device must conform to a specific
format. This format is shown in Figure 15.
Figure 15. 1-Wire IP and TFTP Server IP Address Format
If the IP and TFTP server addresses cannot be acquired from a 1-Wire device, the NetBoot process uses DHCP to
get this information. The DS80C400 broadcasts its MAC address in a DHCP Discover packet. A DHCP server, if
available, should then respond with an IP address offering. The DS80C400 subsequently requests the IP address,
to which the DHCP server must acknowledge. In the DHCP acknowledge packet, the TFTP server IP address is
then read from the “next server IP” field. Because some DHCP servers do not allow configuration of the “next
server IP” field, the DS80C400 recognizes the site-specific option 150 (also used on Cisco IP phones to get TFTP
server IP addresses). When option 150 is present in the acknowledge packet, it will take precedence over the “next
server IP” field.
IPv4 or IPv6
IPv4
‘TINI’
1Dh
54h,49h,4Eh,49h
Address(4)
Gateway(4)
PrefixLength(1)
TFTP Server Address(16)
Checksum(2)
1’S COMPLEMENT
OF CRC-16 (LSB
FIRST)
29 (LENGTH)
IPV4
(BYTE
CONVERTED TO
SUBNET MASK)
NETBOOT
INITIALIZATION CODE
ACQUIRE MAC
ADDRESS FROM DS2502
1-WIRE DEVICE
WITH IP
ADDRESS
FIND USER CODE
TFTP/FLASH WRITE
DHCP
GET IP ADDRESS FROM
1-WIRE DEVICE
NetBoot PROCESS
Y
N
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DS80C400-FNY+ 功能描述:8位微控制器 -MCU Network MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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