Ultra Fast USB 2.0
Datasheet
Chapter 10 GPIO Usage
Table 10.1 USB2250/50i/51/51i GPIO Usage (ROM Rev 0x00)
NAME | ACTIVE LEVEL | SYMBOL | DESCRIPTION AND NOTE |
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|
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GPIO1 | H | LED1 | LED indicator |
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|
|
|
GPIO2 | H | CF_DMARQ / RXD | Compact Flash DMA request / Receive |
|
|
| Port of Debugger |
|
|
|
|
GPIO3 | H | VBUS_DET | USB Vbus detect |
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|
|
|
GPIO4 | H | SCL / xD_ID | Serial EEPROM clock output / xD card |
|
|
| detect |
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|
|
|
GPIO5 | H | SDA | Serial EEPROM data |
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|
|
|
GPIO6 | L | SD_WP | SD Write Protect |
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|
|
|
GPIO7 | H | CF_DMACK / TXD | Compact Flash DMA acknowledge |
|
|
| /Transmit Port of Debugger |
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|
|
|
GPIO8 | L | CRD_PWR0 | Card Power Control |
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|
|
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GPIO9 | L | CRD_PWR1 | Card Power Control |
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GPIO10 | L | CRD_PWR2 | Card Power Control |
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|
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GPIO11 | L | CRD_PWR3 | Card Power Control |
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GPIO12 | L | MS_INS | Memory Stick Card Insertion |
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|
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GPIO13 | L | CF_nCD | Compact Flash card detect |
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|
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GPIO14 | L | xD_nCD | xD card detect |
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|
|
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GPIO15 | L | SD_nCD | Secure Digital card detect |
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|
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USER | GPIO [32:16] | User defined | |
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SMSC USB2250/50i/51/51i | 35 | Revision 1.1 |
DATASHEET