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參數(shù)資料
| 型號： | MAX14502AETL+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 20/41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(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 |
| 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 |
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MAX14500–MAX14503
Hi-Speed USB-to-SD Card
Readers with Bypass
______________________________________________________________________________________
27
sists of two blocks: a clock squarer input (enabled by
default), which accepts low-signal amplitude TCXO sig-
nals (down to 200mV), and a PLL with fixed dividers.
The PLL sub system can be configured using the I2C
interface. The complete list of PLL subsystem combina-
tions are listed in Table 3.
I2C Serial Interface
Serial Addressing
The MAX14500–MAX14503 operate as I2C slave devices
that send and receive data through an I2C-compatible
2-wire interface. The interface uses a serial-data line
(SDA) and a serial-clock line (SCL) to achieve bidirec-
tional communication between master(s) and slave(s). A
master initiates all data transfers to and from the
MAX14500–MAX14503, and generates the SCL clock
that synchronizes the data transfer. The SDA line oper-
ates as both an input and an open-drain output requiring
a pullup resistor on SDA. The SCL line operates only as
an input. A pullup resistor is required on SCL if there are
multiple masters on the 2-wire interface, or if the master
in a single-master system has an open-drain SCL output.
Each transmission consists of a START (S) condition by
a master, followed by the MAX14500–MAX14503’s 7-bit
slave address, plus a R/W bit, a register address byte,
one or more data bytes, and finally a STOP (P) condition.
START and STOP Conditions
Both SCL and SDA remain high when the interface is
idle. A master signals the beginning of a transmission
with a START condition by transitioning SDA from high
to low while SCL is high (Figure 13). When the master
has finished communicating with the slave, it issues a
STOP condition by transitioning SDA from low to high
while SCL is high. The bus is then free for another
transmission.
CLKSOURCE
SOURCE (MHz)
NOTES
00000b
See Ordering
Information/
Selector Guide
Default low-amplitude
clock
00001b
19.2
Rail-to-rail square wave
00010b
19.2
Low-amplitude sine
wave
00101b
13.0
Rail-to-rail square wave
00110b
13.0
Low-amplitude sine
wave
01001b
12.0
Rail-to-rail square wave
01010b
12.0
Low-amplitude sine
wave
01101b
26.0
Rail-to-rail square wave
01110b
26.0
Low-amplitude sine
wave
Table 3. Clock Source Bit Values
SDA
SCL
START
CONDITION
STOP
CONDITION
S
P
Figure 13. START and STOP Conditions
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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 |
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