|
|
| Integrated USB 2.0 Compatible |
|
|
| Datasheet |
| Table 4.1 | ||
|
|
|
|
NAME | SYMBOL | TYPE | FUNCTION |
|
|
|
|
|
| ||
|
|
|
|
USBDN[7:1] | These pins connect to the downstream USB peripheral | ||
Data | USBDP[7:1] |
| devices attached to the Hub’s ports. |
|
|
|
|
USB Power | PRTPWR[7:1] | O12 | Enables power to USB peripheral devices (downstream). |
Enable |
|
| The active signal level of the PRTPWR7:1 pins is |
|
|
| |
|
|
| determined by the Power Polarity Strapping function of the |
|
|
| PRTPWR_POL pin. |
|
|
|
|
Ports [7:5] Green | GR[7:5] | I/O12 | Green indicator LED’s for ports[7:5]. LED is active low |
LED |
|
|
|
|
|
|
|
Port 4:3 Green | GR[4:3]/ | I/O12 | Green indicator LED for ports 4 and 3. Will be active low |
LED | PRT_DIS[1:0] |
| when LED support is enabled via EEPROM or SMBus. |
& |
|
| If the hub is configured by the internal default configuration, |
Port Disable |
|
| |
|
| these pins will be sampled at RESET_N negation to | |
strapping option. |
|
| |
|
| determine if ports [7:5] will be permanently disabled. Also, | |
|
|
| |
|
|
| the active state of the LED’s will be determined as follows: |
|
|
| PRT_DIS[1:0] = ‘00’, All ports are enabled, |
|
|
| GR4 is active high, |
|
|
| GR3 is active high. |
|
|
| PRT_DIS[1:0] = ‘01’, Port 7 is disabled, |
|
|
| GR4 is active high, |
|
|
| GR3 is active low. |
|
|
| PRT_DIS[1:0] = ‘10’, Ports 7 & 6 are disabled, |
|
|
| GR4 is active low, |
|
|
| GR3 is active high. |
|
|
| PRT_DIS[1:0] = ‘11’, Ports 7, 6 & 5 are disabled, |
|
|
| GR4 is active low, |
|
|
| GR3 is active low. |
|
|
|
|
Port [2:1] Green | GR[2:1]/ | I/O12 | Green indicator LED for ports 2 and 1. Will be active low |
LED | NON_REM[1:0] |
| when LED support is enabled via EEPROM or SMBus. |
& |
|
| If the hub is configured by the internal default configuration, |
Port Non- |
|
| |
|
| these pins will be sampled at RESET_N negation to | |
Removable |
|
| |
|
| determine if ports [3:1] contain permanently attached (non- | |
strapping option. |
|
| |
|
| removable) devices. Also, the active state of the LED’s will | |
|
|
| be determined as follows: |
|
|
| NON_REM[1:0] = ‘00’, All ports are removable, |
|
|
| GR2 is active high, |
|
|
| GR1 is active high. |
|
|
| NON_REM[1:0] = ‘01’, Port 1 is |
|
|
| GR2 is active high, |
|
|
| GR1 is active low. |
|
|
| NON_REM[1:0] = ‘10’, Ports 1 & 2 are |
|
|
| GR2 is active low, |
|
|
| GR1 is active high. |
|
|
| NON_REM[1:0] = ‘11’, Ports 1, 2, & 3 are |
|
|
| GR2 is active low, |
|
|
| GR1 is active low. |
|
|
|
|
Ports [7:5] Amber | AM[7:5] | I/O12 | Amber indicator LED’s for ports [7:5], LED is active low. |
LED |
|
|
|
|
|
|
|
Revision 2.3 | 10 | SMSC USB2507 |
| DATASHEET |
|