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參數(shù)資料
| 型號： | MAX14502AETL+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 21/41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
28
______________________________________________________________________________________
Bit Transfer
One data bit is transferred during each clock pulse
(Figure 14). The data on SDA must remain stable while
SCL is high.
Acknowledge
The acknowledge bit is a clocked 9th bit (Figure 15),
which the recipient uses to handshake receipt of each
byte of data. Each byte transferred effectively requires
nine bits. The master generates the 9th clock pulse,
and the recipient pulls down SDA during the acknow-
ledge clock pulse. The SDA line is stable low during the
high period of the clock pulse. When the master is
transmitting to the MAX14500–MAX14503, the
MAX14500–MAX14503 generate the acknowledge bit
because the MAX14500–MAX14503 are the recipients.
When the MAX14500–MAX14503 are transmitting to the
master, the master generates the acknowledge bit
because the master is the recipient.
Slave Addresses
The MAX14500–MAX14503 have a 7-bit long slave
address. The bit following the 7-bit slave address is the
R/W bit, which is low for a write command and high for
a read command. The address bit ADD is externally
driven high or low by the ADD input to select between
two slave addresses to avoid conflict with other I2C
addresses (Figure 16). Table 4 shows the binary values
for reads and writes.
SCL
SDA
BY
TRANSMITTER
CLOCK PULSE FOR
ACKNOWLEDGE
START
CONDITION
SDA
BY
RECEIVER
1
2
8
9
S
Figure 15. Acknowledge
SDA
SCL
DATA LINE STABLE;
DATA VALID
CHANGE OF DATA
ALLOWED
Figure 14. Bit Transfer
SDA
1
ACK
SCL
MSB
LSB
1
0
R/W
1
0
ADD
Figure 16. Slave Address
ADD
FUNCTION
DEVICE ADDRESS
High
Read
1110
0
1
High
Write
1110
0
1
0
GND
Read
1110
0
1
GND
Write
1110
0
Table 4. Slave Addresses
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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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