AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 8

• Manufacturer Part Number: AT83C51SND1C_03
• Description: Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
• Manufacturer: ATMEL [ATMEL Corporation]

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AT8xC51SND1C
Table 6. MutiMediaCard Interface Signal Description
Table 7. UART Signal Description
Table 8. SPI Controller Signal Description
Table 9. TWI Controller Signal Description
Signal
Signal
Signal
Signal
Name
MCMD
Name
Name
Name
MCLK
MDAT
MISO
MOSI
RXD
SCK
SDA
TXD
SCL
SS
Type
Type
Type
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
Description
MMC Clock output
Data or command clock transfer.
MMC Command line
Bidirectional command channel used for card initialization and data
transfer commands. To avoid any parasitic current consumption,
unused MCMD input must be polarized to V
MMC Data line
Bidirectional data channel. To avoid any parasitic current consumption,
unused MDAT input must be polarized to V
Description
Receive Serial Data
RXD sends and receives data in serial I/O mode 0 and receives data in
serial I/O modes 1, 2 and 3.
Transmit Serial Data
TXD outputs the shift clock in serial I/O mode 0 and transmits data in
serial I/O modes 1, 2 and 3.
Description
SPI Master Input Slave Output Data Line
When in master mode, MISO receives data from the slave peripheral.
When in slave mode, MISO outputs data to the master controller.
SPI Master Output Slave Input Data Line
When in master mode, MOSI outputs data to the slave peripheral.
When in slave mode, MOSI receives data from the master controller.
SPI Clock Line
When in master mode, SCK outputs clock to the slave peripheral. When
in slave mode, SCK receives clock from the master controller.
SPI Slave Select Line
When in controlled slave mode, SS enables the slave mode.
Description
TWI Serial Clock
When TWI controller is in master mode, SCL outputs the serial clock to
the slave peripherals. When TWI controller is in slave mode, SCL
receives clock from the master controller.
TWI Serial Data
SDA is the bidirectional Two Wire data line.
DD
DD
or V
or V
SS
SS
.
.
4109E–8051–06/03
Alternate
Function
Alternate
Function
Alternate
Function
Alternate
Function
P3.0
P3.1
P4.0
P4.1
P4.2
P4.3
P1.6
P1.7
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-
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