at85c51snd3 ATMEL Corporation, at85c51snd3 Datasheet - Page 27
at85c51snd3
Manufacturer Part Number
at85c51snd3
Description
At85c51snd3 Single-chip Digital Audio Decoder - Encoder With Usb 2.0 Interface
Manufacturer
ATMEL Corporation
Datasheet
1.AT85C51SND3.pdf
(271 pages)
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7632D–MP3–01/07
Reset Value = XX00 0XXXb
Note:
Table 22. VBAT Register
VBAT (0.85h) – Battery Voltage Monitor Register
Reset Value = 0000 0000b
Number
Number
VBEN
5-3
4-0
Bit
Bit
6
2
1
0
7
7
6
5
1. Reset value depends on the power supply presence and on the internal reset source.
Mnemonic Description
Mnemonic Description
WDTRST
EXTRST
PFDRST
HVDET
VBERR
VBERR
VBEN
VB4:0
Bit
Bit
6
-
-
High Voltage Detect Flag
Set by hardware when 3V is detected on HVDD pin.
Cleared by hardware when 3V is not detected on HVDD pin.
Reserved
The value of these bits is always 0. Do not set these bits.
Watchdog Timer Reset Flag
Set by hardware when the watchdog timer has overflowed triggering and internal
reset.
Must be cleared by software at power-up.
External Reset Flag
Set by hardware when the external RST pin is asserted (warm reset).
Must be cleared by software at power-up.
Power Failure Detector Reset Flag
Set by hardware when the power voltage has been triggered outside its specified
value (cold reset).
Must be cleared by software at power-up.
Battery Monitor Enable Bit
Set to enable the battery monitoring.
Cleared by hardware at the end of conversion
Battery Monitor Error Flag
Set by hardware when conversion is out of min/max values.
Reserved
The value read from this bit is always 0. Do not set this bit.
Battery Value
Refer to Table 18 for voltage value correspondence.
5
-
(1)
VB4
4
VB3
3
VB2
2
VB1
1
VB0
0
27
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