USB 2.0 Flash Drive Controller
Datasheet
Chapter 11 GPIO Usage Table
Table 11.1 - GPIO Usage
NAME |
| ACTIVE | SYMBOL | DESCRIPTION AND NOTE |
| LEVEL | |||
|
|
|
| |
GPIO1 | H |
| Flash Media Activity LED | Indicates media activity. Media or |
|
|
|
| USB cable must not be removed |
|
|
|
| with LED lit. Active High. |
GPIO2 | H |
| Ready/Busy# 1/4 | Ready/Busy# line from NAND |
|
|
|
| Flash chips 0, or 0 & 4 |
GPIO3 | H |
| V_BUS | USB V bus dectect |
GPIO4 | H |
| Ready/Busy# for Chips 1/5 | Ready/Busy# line from NAND |
|
|
|
| Flash chips 1, or 1 & 5 |
GPIO5 | H |
| HS_IND/Ready/Busy# 2/6 | In Rom |
|
|
|
| indicator; in later ROM patterns, |
|
|
|
| the Ready/Busy# line from NAND |
|
|
|
| Flash chips 2, or 2 & 6 |
GPIO6 | H |
| A16 | A16 address line when external |
|
|
|
| Rom is used; unused output |
|
|
|
| otherwise. |
GPIO7 | H |
| Ready/Busy# 3/7 | Ready/Busy# line from NAND |
|
|
|
| Flash chips 3, or 3 & 7 |
SMSC USB97C242 | Page 22 | Revision 1.4 |
DATASHEET