- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1936 > MAX14502AETL+T (Maxim Integrated Products)IC CARD READER USB-SD 40-TQFN PDF資料下載
參數(shù)資料
| 型號： | MAX14502AETL+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/41頁 |
| 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 |
| 標準包裝： | 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 |
| 供應(yīng)商設(shè)備封裝： | 40-TQFN-EP（5x5） |
| 包裝： | 帶卷 (TR) |
| 安裝類型： | 表面貼裝 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當(dāng)前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁
MAX14500–MAX14503
Hi-Speed USB-to-SD Card
Readers with Bypass
______________________________________________________________________________________
21
When the card reader is initiated in the control register,
the internal USB switch disconnects from the host P
USB port and connects to the internal USB Hi-Speed
SD card reader unit. When the MAX14500–MAX14503
disconnect from the host to implement a stand-alone
high-speed card reader, it simulates a disconnect on
the host USB and SD ports to maintain data coherence.
The SD connections are restored to the host P by clos-
ing the analog switch connecting CCRD_PRST to
HCRD_PRST.
Certain registers execute actions when entering Card
Reader mode. These actions are only valid for Card
Reader mode. Writing to these registers in Sleep mode,
or when awake, updates the registers, but the action is
carried out when Card Reader mode is activated for
one of the SD cards (see the
Register Map section).
When Card Reader mode is initially entered, the internal
microcontroller enumerates with the PC to establish a
high-speed USB mass storage device. No actions by the
host P are required for enumeration other than entering
Card Reader mode. Once the USB-SD card connection
is established, PC to SD card data transfer begins and
various interrupts monitor the status the of Card Reader
mode if enabled. The BSY flag is represented externally
by the BUSY output and can be read serially through
I2C. The BUSY output is always active. If the host P
requests Sleep mode in the middle of the data transfer,
the MAX14500–MAX14503 do not complete the transfer,
exit Card Reader mode, reconnect USB switches, and
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 8. Card Reader Mode. The USB port is connected to SD card 1. In the 2 port version, a second SD card (SD slot 2) can be
independently connected and disconnected to the host P.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX14505EWC+T | IC SWITCH DUAL SPDT 12WLP |
| MAX14523BATA/V+T | IC CURRENT LIMIT SWITCH 8TDFN |
| MAX1452AAE+T | IC SENSOR SIGNAL COND 16-SSOP |
| MAX14531EEWC+T | IC USB SWITCH DP3T 12WLP |
| MAX14536EEVB+ | IC SWITCH DPDT 10UTQFN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX14502EVKIT+ | 功能描述:界面開發(fā)工具 MAX14502 Eval Kit RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型: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:模擬開關(guān) IC Dual SPDT Neg Rail w/ +/-VCC Cap RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:2 開關(guān)配置:SPDT 開啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開啟時間（最大值）: 關(guān)閉時間（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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。