SMSC USB20H04 Bedienungsanleitung PDF herunterladen (Seite 21)

4-Port USB 2.0 Controller

Datasheet

SMSC USB20H04 Page 21 Revision 1.63 (03-30-07)

DATASHEET

8.1.2 Internal Default Configuration

The internal default configuration is enabled when SMB_SEL_N is high and CS/EE_SEL is low on the

rising edge of RESET_N. If SELF_PWR is low, then the bus-powered default settings are loaded.

USB20H04

SCK/SCL

SD/SDA

VDD3.3

SMB_SEL_N

CS/EE_SEL

SELF_PWR

Bus/Self

Power Select

0=Bus-Power

1=Self-Power

Figure 8.2 - Internal Default Mode

8.2 EEPROM Programming Values

Configuration data is loaded from an external EEPROM following reset. The values to be programmed into

the EEPROM are summarized in Table 8.1 - Summary of OEM Value Programming.

Table 8.1 - Summary of OEM Value Programming

ADDRESS FIELD NAME DESCRIPTION

0 VID (MSB) Vendor ID (assigned by USB-IF).

1 VID (LSB)

2 PID (MSB) Product ID (assigned by Manufacturer).

3 PID (LSB)

4 DID (MSB) Device ID (assigned by Manufacturer).

5 DID (LSB)

6 Config_Byte_3 Configuration options defined in Table 8.2.

7 Config_Byte_2 Configuration options defined in Table 8.3.

8 Config_Byte_1 Configuration options defined in Table 8.4.

9 Max_Power Maximum current for this configuration, see Table 8.5.

10 HubContrCurrent Maximum current for the USB20H04, see Table 8.5.

11 PwrOn2PwrGood Time until power is stable, see Table 8.5.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 34 35

Keine Kommentare

SMSC USB20H04 Bedienungsanleitung Seite 21