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参数资料
| 型号： | TXS02326RGER |
| 厂商： | Texas Instruments |
| 文件页数： | 35/35页 |
| 文件大小： | 0K |
| 描述： | IC SIM CARD MUX 2:1 24VQFN |
| 产品培训模块： | Voltage Level Translation |
| 标准包装： | 1 |
| 应用： | 移动电话 |
| 接口： | I²C |
| 电源电压： | 1.7 V ~ 3.3 V |
| 封装/外壳： | 24-VFQFN 裸露焊盘 |
| 供应商设备封装： | 24-VQFN 裸露焊盘（4x4） |
| 包装： | 标准包装 |
| 安装类型： | 表面贴装 |
| 其它名称： | 296-27948-6 |
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Slave Address
0
1
0
IRQ
R/W
SCES795C
– SEPTEMBER 2010 – REVISED FEBRUARY 2011
BASIC DEVICE OPERATION
The TXS02326 is controlled through a standard I2C interface reference to VDDIO. It is connected between the
two SIM card slots and the SIM/UICC interface of the baseband. The device uses VBAT and VDDI/O as supply
voltages. The supply voltage for each SIM card is generated by an on-chip low drop out regulator. The interface
between the baseband and the TXS02326 is reference to VDDIO while the interface between the TXS02326 and
the SIM card is referenced to the LDO output of either VSIM1 or VSIM2 depending on which slot is being
selected. The VDDIO on the baseband side normally does not exceed 1.8V, thus voltage level shifting is needed
to support a 3V SIM/UICC interface (Class B).
The TXS02326 has two basic states, the reset and operation state. The baseband utilizes information in the
status registers to determine how to manipulate the control registers to properly switch between two SIM cards.
These fundamental sequences are outlined below and are to help the user to successfully incorporate this device
into the system.
DEVICE ADDRESS
The address of the device is shown below:
Address Reference
IRQ@ Reset
R/W
Slave Address
0
0 (W)
120 (decimal), 78(h)
0
1 (R)
121 (decimal), 79(h)
1
0 (W)
122 (decimal), 7A(h)
1
1 (R)
123 (decimal), 7B(h)
RESET STATE
In the reset state the device settings are brought back to their default values and any SIM card that has been
active is deactivated. After reset, neither of the UICC/SIM interfaces is selected. The active pull-downs at the
UICC/SIM interface are automatically activated. To ensure the system powers up in an operational state, device
uses an internal 32 KHz clock for internal timing generation. After power up, the system has the option to
continue to utilize the internal clock or select an external clock source. This clock source is selectable by the
Clock Source Select I2C register bit.
Power up the TXS02326 by asserting VBAT to enter the operation state
I2C Interface becomes active with the VDD_I/O supply
RESET summary:
Any pending interrupts are cleared
I2C registers are in the default state
BSI and SDN counter value in the registers are set to four clock cycles or
“0000 0100”
Both on chip regulators are set to 1.8V and disabled
All SIM1 and SIM2 signals are pulled to GND
2010–2011, Texas Instruments Incorporated
9
Product Folder Link(s): TXS02326
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