at85c51snd3b ATMEL Corporation, at85c51snd3b Datasheet - Page 144

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

144
AT85C51SND3B
Table 146. UPINRQX Register
UPINRQX (1.DFh) – USB Pipe IN Number Of Request Register
Reset Value = 0000 0000b
Table 147. UPERRX Register
UPERRX (1.D7h) – USB Pipe Error Register
Reset Value = 0000 0000b
Number
Number
INRQ7
7-0
7-6
Bit
Bit
7
7
5
4
3
2
1
0
-
COUNTER1:
COUNTER1 COUNTER0
Mnemonic Description
Mnemonic Description
TIMEOUT
DATATGL
DATAPID
INRQ7:0
CRC16
INRQ6
PID
Bit
Bit
6
6
0
-
IN Request Number Before Freeze
Enter the number of IN transactions before the USB controller freezes the pipe.
The USB controller will perform (INRQ+1) IN requests before to freeze the Pipe.
This counter is automatically decreased by 1 each time a IN request has been
successfully performed.
Reserved
The value read from these bits is always 0. Do not set these bits.
Error counter
This counter is increased by the USB controller each time an error occurs on the
Pipe. When this value reaches 3, the Pipe is automatically frozen.
Clear these bits by software.
CRC16 Error
Set by hardware when a CRC16 error has been detected.
Shall be cleared by software. Setting by software has no effect.
Time-out Error
Set by hardware when a time-out error has been detected.
Shall be cleared by software. Setting by software has no effect.
PID Error
Set by hardware when a PID error has been detected.
Shall be cleared by software. Setting by software has no effect.
Data PID Error
Set by hardware when a data PID error has been detected.
Shall be cleared by software. Setting by software has no effect.
Bad Data Toggle
Set by hardware when a data toggle error has been detected.
Shall be cleared by software. Setting by software has no effect.
INRQ5
5
5
CRC16
INRQ4
4
4
TIMEOUT
INRQ3
3
3
INRQ2
PID
2
2
DATAPID
INRQ1
1
1
7632C–MP3–11/06
DATATGL
INRQ0
0
0