参数资料
| 型号： | KIT13892VLEVBEJ |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 36/158页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MC13892 |
| 标准包装： | 1 |
| 主要目的： | 电源管理和用户界面 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | MC13892 |
| 主要属性： | 10 位 ADC，4 输出降压转换器，12 LDO |
| 次要属性： | 与 i.MX51、i.MX37、i.MX35、i.MX27 一起使用 |
| 已供物品： | 板，线缆，文档 |
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FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
CONTROL LOGIC
LICELL
Coin cell supply input and charger output. The LICELL pin provides a connection for a coin cell backup battery or supercap.
If the main battery is deeply discharged, removed, or contact-bounced (i.e., during a power cut), the RTC system and coin cell
maintained logic will switch over to the LICELL for backup power. This pin also works as a current-limited voltage source for
battery charging. A small capacitor should be placed from LICELL to ground under all circumstances.
XTAL1
32.768 kHz Oscillator crystal connection 1.
XTAL2
32.768 kHz Oscillator crystal connection 2.
GNDRTC
Ground for the RTC block.
CLK32K
32 kHz Clock output for peripherals. At system start-up, the 32 kHz clock is driven to CLK32K (provided as a peripheral clock
reference), which is referenced to SPIVCC. The CLK32K is restricted to state machine activation in normal on mode.
CLK32KMCU
32 kHz Clock output for processor. At system start-up, the 32 kHz clock is driven to CLK32KMCU (intended as the CKIL input
to the system processor) referenced to VSRTC. The driver is enabled by the start-up sequencer and the CLK32KMCU is
programmable for Low-power Off mode control by the state machine.
RESETB AND RESETBMCU
Reset output for peripherals and processor respectively. These depend on the Power Control Modes of operation ( See
Functional Device Operation on page 40 ). These are meant as reset for the processor, or peripherals in a power up condition, or
to keep one in reset while the other is up and running.
WDI
Watchdog input. This pin must be high to stay in the On mode. The WDI IO supply voltage is referenced to SPIVCC (normally
connected to SW4 = 1.8 V). SPIVCC must therefore remain enabled to allow for proper WDI detection. If WDI goes low, the
system will transition to the Off state or Cold Start (depending on the configuration).
STANDBY AND STANDBYSEC
Standby input signal from processor and from peripherals respectively.
To ensure that shared resources are properly powered when required, the system will only be allowed into Standby when both
the application processor (which typically controls the STANDBY pin) and peripherals (which typically control the STANDBYSEC
pin) allow it. This is referred to as a Standby event.
The Standby pins are programmable for Active High or Active Low polarity, and that decoding of a Standby event will take into
account the programmed input polarities associated with each pin. Since the Standby pin activity is driven asynchronously to the
system, a finite time is required for the internal logic to qualify and respond to the pin level changes.
The state of the Standby pins only have influence in the On mode and are therefore ignored during start up and in the
Watchdog phase. This allows the system to power up without concern of the required Standby polarities, since software can
make adjustments accordingly, as soon as it is running.
INT
Interrupt to processor. Unmasked interrupt events are signaled to the processor by driving the INT pin high.
MC13892
Analog Integrated Circuit Device Data
36
Freescale Semiconductor
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