Ultra Fast USB 2.0 Memory Stick Flash Media Controller
Datasheet
Table 5.2 USB2242/2242i
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NAME | SYMBOL | TYPE | DESCRIPTION | |
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USB Transceiver | RBIAS | 35 | A 12.0k , 1.0% resistor is attached from | |
Bias |
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| VSSA to this pin in order to set the |
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| transceiver's internal bias currents. |
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24MHz Crystal or | XTAL1 (CLKIN) | 33 | ICLKx | This pin can be connected to one terminal |
external clock |
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| of the crystal or it can be connected to an |
input |
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| external 24 clock when a crystal is not |
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| used. |
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24MHz Crystal | XTAL2 | 32 | OCLKx | This is the other terminal of the crystal, or |
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| it can be left open when an external clock |
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| source is used to drive XTAL1(CLKIN). It |
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| may not be used to drive any external |
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| circuitry other than the crystal circuit. |
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3.3V Analog | VDDA33 | 36 |
| 3.3V Analog Power |
Power |
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1.8V PLL Power | VDD18PLL | 34 |
| This pin is the 1.8V Power for the PLL. |
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| +1.8V Filtered analog power for internal |
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| PLL. This pin must have a 1.0μF(or |
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| greater) ±20% (ESR <0.1Ω) capacitor to |
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| VSS. |
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| MISC |
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General Purpose | GPIO1 (LED1) | 1 | I/O12 | This pin may be used either as input, edge |
I/O |
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| sensitive interrupt input, or output. |
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| In addition, as an output, the GPIO1 can |
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| use output controlled by the LED1_GPIO1 |
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| register. |
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General Purpose | GPIO2 / RXD / | 27 | I/O12 | GPIO: This pin may be used either as |
I/O | SDA |
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| input, edge sensitive interrupt input, or |
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| output. |
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| I | RXD: In addition to the above, the signal |
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| can be used as input to the RXD of UART |
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| in the device, when the TXD_RXD_SEL |
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| bit in UTIL_CONFIG1 register is cleared to |
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| "0". |
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| I/O12 | SDA: This is the data pin when used with |
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| an external serial EEPROM. |
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General Purpose | GPIO4 | 29 | I/O12 | This pin may be used either as input, edge |
I/O |
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| sensitive interrupt input, or output. |
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SMSC USB2242/USB2242i | 11 | Revision 1.0 |
DATASHEET