Renesas M3A-HS85 Functional Overview , 2.7 USB Interface

Functional Overview

2.7 USB Interface

Rev.1.04 2008.7.10 2-12

REJ10J1564-0104

2

SH7285

USBEXTAL

USBXTAL

Oscillator (48MHz)

Not mounted

VBUS

DrVCC

DrVSS

USD-

USD+

3.3V

USB

series B

connector

Vbus

D+

D-

GND

Ceralock

(Murata)

OE

3.3V

PB10

Vbus PB10 VBUS D+ Remarks

0 0 0 Hi-Z Initial value

0 1 0 Hi-Z

1 0 0 Hi-Z

1 1 Pull-up When USB is connected

2.7 USB Interface

The M3A-HS85 contains a USB connector (Standard-B receptacle).

When a cable is connected to USB host/hub in the state that this CPU board is not turned on, the voltage is

impressed from USB host/hub to VBUS. Thus, the CPU board should be turned on before USB cable is connected.

When you want to delay a notification of connection to USB host/hub (the cases such as in the processing of high

priority or initialization), it can be controlled by PB10. The powered state is kept regardless of the states USD+ and

USD- when pin VBUS of SH7285 is set to low level.

Figure 2.7.1 shows the block diagram of M3A-HS85 USB interface.

Figure 2.7.1 Block Diagram of USB Interface

Contents

Main REJ10J1564-0104 Rev. 1.04 Issued: Jul 15, 2008 Renesas 32-Bit RISC Microcomputers SuperHTM RISCengine Family / SH7285 Group M3 SH7285 CPU Board A -HS85 User's Manual Notes regarding these materials Table of Contents Page Page Overview 1.1 Overview 1.2 Configuration Overview 1.3 External Specifications Overview 1.4 External View Overview 1.5 M3A-HS85 Block Diagram SH7285 SH7285 CPU Board M3A-HS85 Page Page Overview 1.7 M3A-HS85 Memory Mapping Page Page Overview 1.8 Absolute Maximum Ratings 1.9 Recommended Operating Conditions Page Page Page Functional Overview 2.2 CPU Rev.1.04 2008.7.10 2-3 REJ10J1564-0104 2.2 CPU SH7285 Functional Overview 2.3 Memory 2.3.1 SH7285 On-Chip Memory 2.3.2 SRAM 2.3.3 SDRAM SH7285 SDRAM 2.3.4 EEPROM Functional Overview SH7285 2.4 Serial Port Interface Functional Overview 2.5 I/O Ports 2.5 I/O Ports Rev.1.04 2008.7.10 2-9 REJ10J1564-0104 Table 2.5.1 Functions of I/O Ports 2.5 I/O Ports Rev.1.04 2008.7.10 2-10 REJ10J1564-0104 Note *: Connected only when the 0 resistance is mounted. Functional Overview SH7285 Functional Overview 2.7 USB Interface Figure 2.7.1 Block Diagram of USB Interface Rev.1.04 2008.7.10 2-12 REJ10J1564-0104 SH7285 Output from a oscillator connected to EXTAL of the SH7285 Functional Overview 2.9 Reset Module 2.10 Interrupt Switches Functional Overview 2.11 E10A-USB Interface Page Page Operational Specifications 3.1 M3A-HS85 Connectors Outline 3.1.1 H-UDI Connector (J1, J2) Page 3.1.2 Serial Port Connector (J3) 3.1.3 Power Supply Connector (J4) 3.1.4 External Power Supply Connector for SH7285 (J5, J6) 3.1.5 DC Power Jack (J7) 3.1.6 Extension Connectors (J8-J12) Page 3.1.6 Extension Connectors (J8-J12) Rev.1.04 2008.7.10 3-11 REJ10J1564-0104 Note : Only when SRAM and SDRAM are mounted. Page Page 3.1.6 Extension Connectors (J8-J12) Rev.1.04 2008.7.10 3-14 REJ10J1564-0104 Note : Only when SRAM and SDRAM are mounted. 3.1.7 Extension Connector (J13) 3.1.8 USB Connector (J14) 3.1.9 GND Connector (J15) Top view of the component side Board edge Operational Specifications 3.2 Outline of Switches and LEDs 3.2.1 CPU Power Supply Select Jumpers (JP1) 3.2.2 External Power Supply Select Jumper (JP2, JP3, JP4, JP5) 3.2.3 FWE Pin Select Jumper (JP6) 3.2.4 Serial Port Select Jumper (JP7, JP8) 3.2.5 Switch and LED Functions Page 3.2.6 Jumper Switch Setting when Using Development Tool Operational Specifications 3.3 Board Dimensions of M3A-HS85 Page Page SH7285 CPU Board M3A-HS85 SCHEMATICS SH7285 [12.5MHz:CPU] DIP Type (COM) Serial EEPROM SDRAMSRAM SDRAM 16bit access = 16MB R1LV1616RSA-7SR USB Connector USB B for SP3232E Serial Port Connector(COM) UART connector mount hole = GND Power On Reset H-UDI Interface E8a Board fixed hole. DrVCC EXTERNAL SH7285 Extension Connector A/D Connector NMI SWITCH NMI SWITCH CIRCUIT IRQ1 SWITCH