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AT85C51SND3B 数据表(PDF) 11 Page - ATMEL Corporation |
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AT85C51SND3B 数据表(HTML) 11 Page - ATMEL Corporation |
11 / 270 page 11 AT85C51SND3B 7632C–MP3–11/06 USB Controller Table 7. USB Controller Signal Description NFCLE O Command Latch Enable Signal Asserted high during command write cycle. - NFRE O Read Enable Signal Read signal asserted low during NF/SMC read operation. - NFWE O Write Enable Signal Write signal asserted low during NF/SMC write operation. - NFCE0 O Nand Flash 0 Chip Enable NFCE0 is active low and is asserted by the nand flash controller each time it makes access to the device 0. - NFCE1 SMLCK O I Nand Flash 1 Chip Enable NFCE1 is active low and is asserted by the nand flash controller each time it makes access to the selected device. SmartMediaCard/xD-Picture Card Write Lock Signal SMLCK is the card write protected input. A low level on this pin indicates the card is write protected. Note: When used as SMLCK input, pad has internal pull-up. P4.4 NFCE2 SMINS O I Nand Flash 2 Chip Enable NFCE2 is active low and is asserted by the nand flash controller each time it makes access to the selected device. SmartMediaCard/xD-Picture Card Insertion Signal SMINS is the card presence signal. A low level on this input indicates the card is present in its slot. Note: When used as SMINS input, pad has internal pull-up. P4.5 NFCE3 SMCE O Nand Flash 3 Chip Enable NFCE3 is active low and is asserted by the nand flash controller each time it makes access to the selected device. SmartMediaCard/xD-Picture Card Chip Enable SMCE is active low and is asserted by the nand flash controller each time it makes access to the card. P4.6 NFWP O Write Protect Signal NFWP is the Nand Flash / SmartMediaCard/xD-Picture Card write protect signal. This signal is active low and is set to low during reset in order to protect the memory against parasitic writes. - Signal Name Type Description Alternate Function Signal Name Type Description Alternate Function DPF I/O USB Full Speed Positive Data Upstream Port - DMF I/O USB Full Speed Minus Data Upstream Port - DPH I/O USB High Speed Plus Data Upstream Port - DMH I/O USB High Speed Minus Data Upstream Port - UVCON O USB VBUS Control line UVCON is used to control the external VBUS power supply ON or OFF. Note: This output is requested for OTG mode. P3.6 |
类似零件编号 - AT85C51SND3B |
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类似说明 - AT85C51SND3B |
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