ST92T163R4D0 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92T163R4D0

8/16-BIT FULL SPEED USB MCU FOR COMPOSITE DEVICES WITH 16 ENDPOINTS, 20K ROM, 2K RAM, I2C, SCI, & MFT

STMicroelectronics 

ST92163 - USB PERIPHERAL (USB)

8.3 USB PERIPHERAL (USB)

8.3.1 Introduction

The USB Peripheral provides a full-speed function

interface between the USB bus and the ST9 mi-

crocontroller.

8.3.2 Main Features

s USB Specification Version 1.1 Compliant

s Supports 8 device addresses

s 16 software configurable endpoints supporting:

• All USB transfer types (control, interrupt, bulk , and

isochronous)

• Burst-DMA transfers to up to 1K bytes RAM buffers

s USB Suspend/Resume operations

s On-Chip 3.3V Regulator

s On-Chip USB Transceiver

s Special functions on alternate output pins:

• USB upstream port Output Enable signal (USBOE)

• Start-Of-Frame pulse (SOFP)

s Two bit-mirror registers

8.3.3 Functional Description

The USB interface is composed of the following

blocks (see Figure 69)

s SIE (Serial Interface Engine): implementing

USB protocol layer (for a detailed description of

USB protocol refer to chapter 7, 8 of the

“Universal Serial Bus Specification”). The

functions of this block include: synchronisation

Figure 69. Block Diagram

DP0 DM0

USBOE

pattern recognition, bit-stuffing, CRC generation

and checking, PID verification/generation and

handshake evaluation. It must interface with

USB bus on one side and with the ST9 core on

the other side.

s ST9 interface: this block is connected between

the SIE and the ST9 microcontroller. Its purpose

is to handle specific endpoint registers and

provide interrupt and DMA servicing to the SIE.

The unit transfers data from or to the memory,

and uses the Register File to save/load pointer

and counter values without CPU intervention,

taking control of the ST9 buses (Burst-DMA

interface). The ST9 Interface unit uses

interrupts to require attention from the

microcontroller at the end of data transmission/

reception, and to flag error conditions.

s Port Interface: this block contains the logic

related to the USB physical port. The port

interface also handles the resume detection.

s Frame Timer: its function is to monitor the Start-

of-Frame (SOF) timing points. It detects a global

suspend (from the host) when no USB traffic

has been seen for 3 ms. It also generates the

SOFP output for any external device requiring

Start-of-Frame synchronization.

s Port transceiver: containing differential and

single-ended receivers and slew rate controlled

output buffers.

SOFP

Transceiver

+

3.3 V

regulator

Full-Speed

SIE

Port

Interface

Endpoint

Logic and

Registers

SOF Timer

Burst

DMA

Controller

Inte rrupt

Controller

LP_SUSP

WKUP15

WUIMU

135/224

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