Architecture

STM7710

20/23

2.16

Interfaces

2.16.1

USB

The STM7710 has an integrated USB host controller with one host port. The USB host

interface is partially compliant with OHCI/EHCI rev 1.0 and USB rev 2.0, allowing

connection to a hard-disk drive only. All speeds up to 480 Mbit/s are supported.

2.16.2

Modem

Standard solutions are available for V22bis software modems and V34/V90 controllerless

modems ported to the STM7710 architecture.

An integrated interface to the SiLabs DAA allows a two-wire capacitively coupled connection

to the line-side device (no transformer required).

A modem analog front-end (MAFE) interface allows direct connection to an external codec

to support this software modem capability. The MAFE interface has its own two-channel

DMA controller for sample transfers to and from buffers.

2.16.3

Internal peripherals

The STM7710 has many dedicated internal peripherals for digital TV receiver applications,

including:

●

2 smartcard controllers,

●

4 ASCs (UARTs), two of which are generally used by the smartcard controllers,

●

Teletext serializer and DMA,

●

●

6 GPIO ports (5V tolerant),

●

2 PWM modules:

–

the first (“PWM4”, also used as ST20-C1 time slicer), usable as timer or to control

one PWM output,

–

a second, dual module (“PWM-Timer2”) with each channel usable as a timer or to

control a PWM output,

●

a multi-channel, infrared blaster/decoder interface module,

●

an interrupt level controller with 4 external interrupt inputs (5 V tolerant).

2.16.4

Smartcard interfaces

Both STM7710 smartcard interfaces are ISO7816, EMV2000 and NDS compliant by adding

a simple external power switch.

A programmable hardware power control feature allows the power control signal to be

switched when a card’s insertion or removal is detected.