參數(shù)資料
型號(hào)： MAX14502AETL+T
廠商： Maxim Integrated Products
文件頁數(shù)： 24/41頁
文件大小： 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
MAX14500–MAX14503
Hi-Speed USB-to-SD Card
Readers with Bypass
30
______________________________________________________________________________________
56-bump WLP version, containing one port and two
SD cards. The host SD ports 1 and 2 are connected
together at the host. This configuration allows two
SD cards connected to one host, but only one SD
card is connected to the host at a time. The host
uses the MAX14500–MAX14503’s internal SD port
switches to multiplex between the cards. This con-
figuration can also be used to limit the bus capaci-
tive loading of having two cards connected at the
same time to the bus (Figure 4).
SD Card Clock Frequency
The SD card clock frequency is the lower of the maxi-
mum the card can support as read from the SD card
and base SD clock (base SD clock is determined from
values shown in Table 5). The MAX14500–MAX14503
internally read the max frequency directly from the SD
card. In I2C control, the maximum clock frequency is
programmable to values lower than the maximum
allowed by the SD card, helping with issues such as
excessive bus capacitance causing data errors.
1110
00
0
ADDRESS = 0xE0
S
0 = WRITE
0000
001
0
REGISTER ADDRESS = 0x01
0
1110
00
0
ADDRESS = 0xE1
S
1 = READ
1
A
REGISTER 0x01 READ DATA
D7
D6
D5
D4
D2
D1
D3
P
D0
A/A
P
A
Figure 19. Format for Reading
1110
0
ADDRESS = 0xE0
S
0 = WRITE
0000
000
0
REGISTER ADDRESS = 0x00
0
1111
0
ADDRESS = 0xE1
S
1 = READ
1
A
REGISTER 0x00 READ DATA
D7
D6
D5
D4
D2
D1
D3
D0
A
REGISTER 0x02 READ DATA
D7
D6
D5
D4
D2
D1
D3
D0
A
REGISTER 0x01 READ DATA
D7
D6
D5
D4
D2
D1
D3
D0
A
P
REGISTER 0x03 READ DATA
D7
D6
D5
D4
D2
D1
D3
D0
A
P
A
Figure 20. Format for Reading Multiple Registers
INPUT FREQUENCY (MHz)
BASE SD CLOCK (MHz)
12
48
13
52
19.2
48
26
52
Table 5. Maximum SD Card Clock Frequency
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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(píng)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(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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