參數(shù)資料
型號(hào)： MAX14502AETL+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 13/41頁(yè)
文件大?。?/td> 0K
描述： IC CARD READER USB-SD 40-TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
應(yīng)用： USB
接口： I²C，2 線串口
電源電壓： 1.8 V ~ 3.3 V
封裝/外殼： 40-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 40-TQFN-EP（5x5）
包裝： 帶卷 (TR)
安裝類(lèi)型： 表面貼裝
MAX14500–MAX14503
Hi-Speed USB-to-SD Card
Readers with Bypass
20
______________________________________________________________________________________
Default Power-Up (Pass Thru Mode)
In the default Pass Thru mode, the MAX14500–
MAX14503 are transparent and the existing host func-
tions (access to SD cards and USB) are preserved
(Figure 7). The host P reads and writes data to the SD
card from the SD port, and can communicate to a PC
through its existing full-speed USB port. All of the fea-
tures of the original chipset are intact. The MAX14500–
MAX14503 sleep when in Pass Thru mode (WAKEUP =
0), when the MODE input is low, or when the MODE bits
[2:1] in control register (0x00) are set to Card Reader
mode, not active. In Sleep mode, the internal microcon-
troller is turned off and current consumption is mini-
mized. The settings for SD port switches for card 1 and
card 2 are controlled by SD port switch bits [4:3] in the
control register.
Card Reader Mode
In Card Reader mode, the PC communicates with the
SD card through USB with an internal Hi-Speed SD
card reader, bypassing the host P. Figure 8 shows
card reader mode with SD card 1 connected to the PC
with the internal card reader. The 40-pin TQFN can
connect to a single SD card in Card Reader mode. With
the 56-bump WLP operating under I2C control, either
SD card can be selected for Card Reader mode.
CCLK2
CCMD2
CDAT2_[3:0]
HCLK2
HCMD2
HDAT2_[3:0]
4
SD
PORT2
SD
SLOT2
CD+
SD PORT 2 SWITCHES
HOST PROCESSOR
USB SWITCHES
CD-
D+
D-
HD+
HD-
USB
CONNECTOR
SD CARD INTERFACE
USB HS
CARD READER
CCRD_PRST
SD PORT 1 SWITCHES
CCLK1
CCMD1
HCRD_PRST
HCLK1
HCMD1
4
CDAT1_[3:0]
HDAT1_[3:0]
SD
PORT1
I/O
LEVEL
TRANSLATORS
HOST
I/O
SD
SLOT1
USB
TRANSCEIVER
MAX14500–
MAX14503
Figure 7. Default Startup (Pass Thru Mode)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX14502EVKIT+ 功能描述:界面開(kāi)發(fā)工具 MAX14502 Eval Kit RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
MAX14503AEWN+ 制造商:Maxim Integrated Products 功能描述:
MAX14503ETL+ 制造商:Maxim Integrated Products 功能描述:
MAX14504EWC+T 功能描述:模擬開(kāi)關(guān) IC Dual SPDT Neg Rail w/ +/-VCC Cap RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:2 開(kāi)關(guān)配置:SPDT 開(kāi)啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16
MAX14505AEWC+ 制造商:Maxim Integrated Products 功能描述:DUAL SPDT NEGATIVE RAIL ANALOG SWIT - Rail/Tube
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