at85c51snd3b ATMEL Corporation, at85c51snd3b Datasheet - Page 10

• Manufacturer Part Number: at85c51snd3b
• Description: Single-chip Digital Audio Decoder - Encoder With Usb 2.0 Interface
• Manufacturer: ATMEL Corporation

Clock Controller
Memory Controllers
10
AT85C51SND3B
Table 4. Clock Signal Description
Table 5. Secure Digital Card / MutiMediaCard Controller Signal Description
Table 6. Nand Flash / SmartMedia Card Controller Signal Description
SDDAT3:0
SDCMD
UPVDD
APVDD
NFD7:0
UPVSS
APVSS
SDCLK
SDLCK
NFALE
Signal
Signal
SDINS
Signal
Name
Name
Name
X1
X2
Type Description
PWR
PWR
Type Description
Type Description
GND
GND
I/O
I/O
I/O
O
O
O
I
I
I
Input of the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to
this pin. If an external oscillator is used, its output is connected to this
pin. X1 is the clock source for internal timing.
Output of the on-chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to
this pin. If an external oscillator is used, leave X2 unconnected.
USB PLL Supply voltage
Connect this pin to LVDD pin.
USB PLL Circuit Ground
Connect this pin to LVSS pin.
Audio PLL / Oscillator Supply voltage
Connect this pin to LVDD pin.
Audio PLL / Oscillator Circuit Ground
Connect this pin to LVSS pin.
SD/MMC Clock
Data or command clock transfer.
SD/MMC Command Line
Bidirectional command line used for commands and responses transfer.
SD/MMC Data Lines
Bidirectional data lines. In 1-bit mode configuration SDDAT0 is the DAT
signal and SDDAT3:1 are not used and can be reused as I/O ports.
SD/MMC Card Insertion Signal
SDINS is the card presence signal. A low level on this input indicates
the card is present in its slot.
Note:
SD Card Write Lock Signal
SDLCK is the SD Card write protected input. A low level on this pin
indicates the card is write protected.
Note:
Memory Data Bus
8-bit bidirectional data bus.
Address Latch Enable Signal
Asserted high during address write cycle.
This signal is generated by the SD/MMC card connector.
This signal is generated by the SD/MMC card connector.
7632C–MP3–11/06
Alternate
Function
Alternate
Function
Alternate
Function
P2.7:4
P2.3
P2.2
P2.0
P2.1
-
-
-
-
-
-
-
-