參數(shù)資料
型號(hào)： MAX14502AETL+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 19/41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
26
______________________________________________________________________________________
Reset (RST)
Drive RST low to reset all the registers to the default
value and minimize the supply current.
Sleep
The MAX14500–MAX14503 can be put to sleep by pro-
gramming the WAKEUP bit to 0 in the control register
with I2C control, or by driving the MODE input low in
simple control. This turns off the internal microcontroller
to minimize current. Reads and writes to the I2C are still
functional, and registers can be updated with new val-
ues. Most register actions do not take effect until the
internal microcontroller wakes up or when Card Reader
mode is enabled. The SD port analog switches can
change states while the internal microcontroller is in
Sleep mode. The
Register Map section shows which
registers are enabled in Sleep mode, at power-up, and
upon entering Card Reader mode.
Clock Configuration
The MAX14500–MAX14503 come preprogrammed to
accept a 12MHz, 13MHz, 19.2MHz, or 26MHz default
clock input with the clock squarer enabled for low-
amplitude
TCXO
signals
(see
the
Ordering
Information/Selector Guide). This clock is used for the
USB and SD subsystems and is not required for opera-
tion of the I2C interface. This allows the clock frequency
to be changed in the system. The PLL subsystem con-
RUNTIME
NOTE: THIS IS VALID FOR I2C CONTROL ONLY
INTERRUPT
REQUEST REGISTERS
READ?
IS
INT ENABLED?
HAS
INTERRUPT STATUS
CHANGED?
IS INTERRUPT
MASK BIT
ENABLED?
YES
INTERRUPT STATUS
REGISTER BIT UPDATED
INTERRUPT REQUEST
REGISTER BIT SET
CLEAR INT
INT ENABLED-BASED
ON INTPULSE AND
INTACTHI FIELD SETTINGS
INTERRUPT ACTIVITY
OCCURS
NO
Figure 12. Typical Interrupt Servicing Flowchart
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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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