USB 2.0 Flash Drive Controller
Datasheet
Note: nMCE is normally asserted except when the 8051 is in standby mode.
6.1Buffer Type Descriptions
Table 6.2 - USB97C242 Buffer Type Descriptions
BUFFER | DESCRIPTION |
I | Input |
IPU | Input with internal weak |
IPD | Input with internal weak |
| resistor. |
IS | Input with Schmitt trigger |
I/O4 | Input/Output with 4mA drive |
I/OD4 | Input/Open drain output … 4mA sink |
I/O8 | Input/Output with 8mA drive |
I/OD8 | Input/Open drain output … 8mA sink |
I/OPD8 | Input/Output with 8mA drive and |
| controlled weak pull down. |
I/OPU8 | Input/Output with 8mA drive and |
| controlled weak pull up. |
O4 | Output with 4mA drive |
O8 | Output with 8mA drive |
OPD8 | Output with 8mA drive and controlled |
| weak pull down. |
OPU8 | Output with 8mA drive and controlled |
| weak pull up. |
I/O12 | Output with 12mA drive |
I/OPU12 | Input/Output with 12mA drive and |
| controlled weak pull up on input. |
OPU12 | Output with 12mA drive and controlled |
| weak pull up. |
OPD12 | Output with 12mA drive and controlled |
| weak pull down. |
O12 | Output with 12mA drive |
OD12 | Open drain….12mA sink |
ICLKx | XTAL clock input |
OCLKx | XTAL clock output |
Defined in USB specification |
SMSC USB97C242 | Page 15 | Revision 1.4 |
DATASHEET