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AM1808AZCED4 Fiches technique(PDF) 21 Page - Texas Instruments |
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AM1808AZCED4 Fiches technique(HTML) 21 Page - Texas Instruments |
21 / 264 page AM1808 www.ti.com SPRS653A – FEBRUARY 2010 – REVISED APRIL 2010 3.7.3 Real-Time Clock and 32-kHz Oscillator Table 3-5. Real-Time Clock (RTC) and 1.2-V, 32-kHz Oscillator Terminal Functions SIGNAL POWER TYPE(1) PULL(2) DESCRIPTION GROUP(3) NAME NO. RTC_XI J19 I — — RTC 32-kHz oscillator input RTC_XO H19 O — — RTC 32-kHz oscillator output RTC_ALARM / UART2_CTS / GP0[8] / DEEPSLEEP F4 O CP[0] A RTC Alarm RTC module core power RTC_CVDD L14 PWR — — (isolated from chip CVDD) RTC_Vss H18 GND — — Oscillator ground (for filter) (1) I = Input, O = Output, I/O = Bidirectional, Z = High impedance, PWR = Supply voltage, GND = Ground, A = Analog signal. Note: For multiplexed pins where functions have different types (ie., input versus output), the table reflects the pin function direction for that particular peripheral. (2) IPD = Internal Pulldown resistor; IPU = Internal Pullup resistor; CP[n] = configurable pull-up/pull-down (where n is the pin group) using the PUPDENA and PUPDSEL registers in the System Module. The pull-up and pull-down control of these pins is not active until the device is out of reset. During reset, all of the pins associated with these registers are weakly pulled down. If the application requires a pull-up, an external pull-up can be used. (3) This signal is part of a dual-voltage IO group (A, B or C). These groups can be operated at 3.3V or 1.8V nominal. The three groups can be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power supply DVDD3318_C. 3.7.4 DEEPSLEEP Power Control Table 3-6. DEEPSLEEP Power Control Terminal Functions SIGNAL POWER TYPE(1) PULL(2) DESCRIPTION GROUP(3) NAME NO. RTC_ALARM / UART2_CTS / GP0[8] / DEEPSLEEP F4 I CP[0] A DEEPSLEEP power control output (1) I = Input, O = Output, I/O = Bidirectional, Z = High impedance, PWR = Supply voltage, GND = Ground, A = Analog signal. Note: For multiplexed pins where functions have different types (ie., input versus output), the table reflects the pin function direction for that particular peripheral. (2) IPD = Internal Pulldown resistor; IPU = Internal Pullup resistor; CP[n] = configurable pull-up/pull-down (where n is the pin group) using the PUPDENA and PUPDSEL registers in the System Module. The pull-up and pull-down control of these pins is not active until the device is out of reset. During reset, all of the pins associated with these registers are weakly pulled down. If the application requires a pull-up, an external pull-up can be used. (3) This signal is part of a dual-voltage IO group (A, B or C). These groups can be operated at 3.3V or 1.8V nominal. The three groups can be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power supply DVDD3318_C. Copyright © 2010, Texas Instruments Incorporated Device Overview 21 Submit Documentation Feedback Product Folder Link(s): AM1808 |
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