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USB2227 数据表(PDF) 8 Page - Microchip Technology |
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USB2227 数据表(HTML) 8 Page - Microchip Technology |
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8 / 25 page  USB2227/USB2228 DS00002256A-page 8 2007-2016 Microchip Technology Inc. CF_nCD2 54 IPU CF Card Detection2: This card detection pin is connected to the ground on the CF device, when the CF device is inserted. This pin has an internally controlled weak pull-up resistor. CF_nCD1 53 IPU CF Card Detection1: This card detection pin is connected to ground on the CF device, when the CF device is inserted. This pin has an internally controlled weak pull-up resistor. CF_nRESET 59 O8 CF Hardware Reset: This pin is an active low hardware reset signal to CF device. CF_nIOR 57 O8 CF IO Read: This pin is an active low read strobe signal for CF device. CF_nIOW 58 O8 CF IO Write Strobe: This pin is an active low write strobe signal for CF device. SmartMedia Interface SM_nWP 74 O8PD SM Write Protect: This pin is an active low write protect signal for the SM device. This pin has a weak pull-down resistor that is permanently enabled. SM_ALE 73 O8PD SM Address Strobe: This pin is an active high Address Latch Enable signal for the SM device. This pin has a weak pull-down resistor that is permanently enabled. SM_CLE 75 O8PD SM Command Strobe: This pin is an active high Command Latch Enable signal for the SM device. This pin has a weak pull-down resistor that is permanently enabled. SM_D[7:0] 72 71 70 69 68 67 66 65 I/O8PD SM Data 7-0: 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_nRE 81 08PU SM Read Enable: 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). Symbol 128-Pin VTQFP Buffer Type Description |
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