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USB2601 数据表(PDF) 13 Page - Microchip Technology |
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USB2601 数据表(HTML) 13 Page - Microchip Technology |
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13 / 30 page  2004 - 2016 Microchip Technology Inc. DS00002119A-page 13 USB2601/USB2602 SM Data[7:0] SM_D[7:0] I/O8PD These pins are the bi-directional data signal SM_D7- SM_D0. The bi-directional data signal has an internal weak pull- down resistor. SM Read Enable SM_nRE 08PU This pin is an active low read strobe signal for SM device. When using the internal FET, this pin has an internal weak pull-up resistor that is tied to the output of the internal Power FET. 08 If an external FET is used (Internal FET is disabled), then the internal pull-up is not available (external pull-ups must be used, and should be connected to the applicable Card Power Supply). SM Write Enable SM_nWE O8PU This pin is an active low write strobe signal for SM device. When using the internal FET, this pin has an internal weak pull-up resistor that is tied to the output of the internal Power FET. 08 If an external FET is used (Internal FET is disabled), then the internal pull-up is not available (external pull-ups must be used, and should be connected to the applicable Card Power Supply). SM Write Protect Switch SM_nWPS IPU A write-protect seal is detected, when this pin is low. This pin has an internally controlled weak pull-up resistor. SM Busy or Data Ready SM_nB/R I This pin is connected to the BSY/RDY pin of the SM device. An external pull-up resistor is required on this signal. The pull-up resistor must be pulled up to the same power source that powers the SM/NAND flash device. SM Chip Enable SM_nCE O8PU This pin is the active low chip enable signal to the SM device. When using the internal FET, this pin has an internal weak pull-up resistor that is tied to the output of the internal Power FET. 08 If an external FET is used (Internal FET is disabled), then the internal pull-up is not available (external pull-ups must be used, and should be connected to the applicable Card Power Supply). SM Card Detection SM_nCD IPU This is the card detection signal from SM device to indicate if the device is inserted. This pin has an internally controlled weak pull-up resistor. MEMORY STICK INTERFACE MS Bus State MS_BS O8 This pin is connected to the BS pin of the MS device. It is used to control the Bus States 0, 1, 2 and 3 (BS0, BS1, BS2 and BS3) of the MS device. MS System Data In/Out MS_SDIO/MS_D 0 I/O8PD This pin is a bi-directional data signal for the MS device. Most significant bit (MSB) of each byte is transmitted first by either MSC or MS device. The bi-directional data signal has an internal weak pull- down resistor. MS System Data In/Out MS_D1 I/O8PD This pin is a bi-directional data signal for the MS device. This pin has internally controlled weak pull-up and pull- down resistors for various operational modes. Name Symbol Buffer Type Description |
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