STn8810

Overview

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1.20

Master display interface (MDIF)

This interface drives LCD display modules, that is, panels that include their own display

memory and perform LCD panel refresh themselves. The MDIF is a parallel bidirectional

interface that can send commands or data to or read data from the display panel logic. It has

a DMA engine to automatically fetch data/commands from main memory without CPU

intervention.

1.21

Pulse width light modulator (PWL)

The PWL provides control of LCD backlighting. It produces a series of pulses that are fed to

the backlighting, where the width (or duty cycle) of the pulses determines the perceived

lighting level. An 8-bit random sequence generator decreases the spectral power at the

modulator harmonic frequencies.

1.22

General purpose inputs/outputs (GPIOs)

The STn8810 provides 96 programmable inputs or outputs that have switchable pull-up and

pull-down resistors and are controllable in two modes:

●

Software mode through an APB bus interface

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Hardware mode through a hardware control interface

The GPIO interface provides the following individually programmable functions:

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Any number of pins may be configured as interrupt sources

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Debouncing logic can be enabled for each GPIO to filter out glitches on I/Os

●

Any GPIO may be used to wake up the device from sleep mode independent of

interrupt programming, and the input level that triggers wake-up is definable for each

enabled GPIO.

1.23

MultiMediaCard/secure data card interface (MMC/SD)

This interface can directly control one SD card (without encryption/decryption logic), or one

MultiMediaCard. It also supports several of each card type using the GPIOs for card

selection.

1.24

USB On-The-Go interface

The STn8810 USB interface is USB 2.0 compliant, with On-The-Go standard extension (rev

1.0) compliance. The USB-OTG features:

●

Supports full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s) signaling bit rate

●

Supports session request protocol (SRP) and host negotiation protocol (HNP)

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7 bidirectional endpoints plus control endpoint 0

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Digital interface to external PHY

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Fully compatible with STw4810 power manager companion chip