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参数资料
| 型号： | MAX14502AETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/41页 |
| 文件大小： | 0K |
| 描述： | IC CARD READER USB-SD 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | USB |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.8 V ~ 3.3 V |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX14502EVKIT+ | 功能描述:界面开发工具 MAX14502 Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压: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:模拟开关 IC Dual SPDT Neg Rail w/ +/-VCC Cap RoHS:否 制造商:Texas Instruments 开关数量:2 开关配置:SPDT 开启电阻（最大值）:0.1 Ohms 切换电压（最大）: 开启时间（最大值）: 关闭时间（最大值）: 工作电源电压:2.7 V to 4.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体: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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