13892 datasheet(38/158 Pages) FREESCALE

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FUNCTIONAL DESCRIPTION

FUNCTIONAL PIN DESCRIPTION

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC13892

CLK

Primary SPI clock input. In I2C mode, this pin is the SCL signal (I2C bus clock).

MOSI

Primary SPI write input. In I2C mode, the MOSI pin hard wired to ground or VCORE is used to select between two possible

addresses (A0 address selection).

MISO

Primary SPI read output. In I2C mode, this pin is the SDA signal (bi-directional serial data line).

GNDSPI

Ground for SPI interface.

USB

UID

This pin identifies if a mini-A or mini-B style plug has been connected to the application. The state of the ID detection can be

read via the SPI, to poll dedicated sense bits for a floating, grounded, or factory mode condition on the UID pin.

UVBUS

1. USB transceiver cable interface.

2. OTG supply output.

When SWBST is configured to supply the UVBUS pin in OTG mode, the feedback will switch to sense the UVBUS pin instead

of the SWBSTFB pin.

VUSB

This is the regulator used to provide a voltage to an external USB transceiver IC.

VINUSB

Input option for VUSB; supplied by SWBST. This pin is internally connected to the UVBUS pin for OTG mode operation (for

more details about OTG mode).

Note: When VUSBIN = 1, UVBUS will be connected via internal switches to VINUSB and incur some current drain on that pin,

as much as 270

A maximum, so care must be taken to disable this path and set this SPI bit (VUSBIN) to 0 to minimize current

drain, even if SWBST and/or VUSB are disabled.

VBUSEN

External VBUS enable pin for the OTG supply. VBUS is defined as the power rail of the USB cable (+5.0 V).

A TO D CONVERTER

Note: The ADIN5/6/7 inputs must not exceed BP.

ADIN5

ADC generic input channel 5. ADIN5 may be used as a general purpose unscaled input, but in a typical application, ADIN5 is

used to read out the battery pack thermistor. The thermistor must be biased with an external pull-up to a voltage rail greater than

the ADC input range. In order to save current when the thermistor reading is not required, it can be biased from one of the general

purpose IOs such as GPO1. A resistor divider network should assure the resulting voltage falls within the ADC input range, in

particular when the thermistor check function is used.

ADIN6

ADC generic input channel 6. ADIN6 may be used as a general purpose unscaled input, but in a typical application, the PA

thermistor is connected here.

13892 Datasheet(PDF) 38 Page - Freescale Semiconductor, Inc

13892 Datasheet(HTML) 38 Page - Freescale Semiconductor, Inc

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