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AT85C51SND3B 数据表(PDF) 11 Page - ATMEL Corporation

部件名 AT85C51SND3B
功能描述  Single-Chip Digital Audio Decoder - Encoder with USB 2.0 Interface
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制造商  ATMEL [ATMEL Corporation]
网页  http://www.atmel.com
标志 ATMEL - ATMEL Corporation

AT85C51SND3B 数据表(HTML) 11 Page - ATMEL Corporation

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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


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