The LED Drivers, weak pull-ups, and VDD
參數(shù)資料
型號(hào): POE-VOICE-RD
廠商: Silicon Laboratories Inc
文件頁數(shù): 49/108頁
文件大?。?/td> 0K
描述: KIT REF DESIGN PWR OVER ETHERNET
標(biāo)準(zhǔn)包裝: 1
主要目的: 參考設(shè)計(jì),以太網(wǎng)供電(POE),語音傳輸
嵌入式: 是,MCU,8 位
已用 IC / 零件: C8051F340,CP2201,Si3400
主要屬性: 嵌入式以太網(wǎng),以太網(wǎng)供電,8 kHz 語音采樣系統(tǒng)
次要屬性: 圖形用戶界面
已供物品: 板,線纜,電源,軟件
產(chǎn)品目錄頁面: 626 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: 336-1385-ND - IC POWER OVER ETHERNET 20QFN
336-1322-ND - IC POWER OVER ETHERNET 20QFN
336-1313-ND - IC ETH CTRLR SNGL-CHIP 28QFN
336-1298-ND - IC 8051 MCU FLASH 64K 48TQFP
其它名稱: 336-1326
CP2200/1
Rev. 1.0
45
10.5. Disabling Secondary Device Functions
The LED Drivers, weak pull-ups, and VDD Monitor can be disabled to minimize power consumption. The typical
supply current for the VDD Monitor is specified in Table 13 on page 42. Disabling weak pull-ups will save current if
the MOTEN and MUXEN pins are tied to ground, but will cause the address and data pins to float (causing
undefined device behavior and increased power consumption) if they are not externally driven or pulled to a
defined logic level using pull-up or pull-down resistors. The internal weak pull-ups should not be disabled unless all
digital pins are externally driven to a logic high or logic low state.
Register 15. IOPWR: Port Input/Output Power Register
Bits 7–4: UNUSED. Read = 0000b, Write = don’t care.
Bit 3
ACTEN: Activity LED Enable
0: Activity LED disabled.
1: Activity LED enabled.
Bit 2
LINKEN: Link LED Enable (Link/Activity LED on CP2201)
0: Link (Link/Activity) LED disabled.
1: Link (Link/Activity) LED enabled.
Bit 1:
WEAKD: Weak Pull-up Disable
0: Weak pull-ups are enabled.
1: Weak pull-ups are disabled.
Bit 0:
Reserved. Read = 0b; Must write 0b.
R/W
Reset Value
ACTEN
LINKEN
WEAKD
Reserved 00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Address:
0x70
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