AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 157

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

4109E–8051–06/03
Table 133. SPSTA Register
SPSTA (S:C4h) – SPI Status Register
Reset Value = 00000 0000b
Table 134. SPDAT Register
SPDAT (S:C5h) – Synchronous Serial Data Register
Reset Value = XXXX XXXXb
Number
Number
SPD7
SPIF
3 - 0
7 - 0
Bit
Bit
7
7
7
6
5
4
Mnemonic Description
Mnemonic Description
WCOL
SPD7:0
WCOL
SPD6
MODF
SPIF
Bit
Bit
6
6
-
-
SPI Interrupt Flag
Set by hardware when an 8-bit shift is completed.
Cleared by hardware when reading or writing SPDAT after reading SPSTA.
Write Collision Flag
Set by hardware to indicate that a collision has been detected.
Cleared by hardware to indicate that no collision has been detected.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Mode Fault
Set by hardware to indicate that the SS pin is at an appropriate level.
Cleared by hardware to indicate that the SS pin is at an inappropriate level.
Reserved
The value read from these bits is indeterminate. Do not set these bits.
Synchronous Serial Data.
SPD5
5
5
-
MODF
SPD4
4
4
SPD3
3
3
-
AT8xC51SND1C
SPD2
2
2
-
SPD1
1
1
-
SPD0
0
0
-
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