ata6616 ATMEL Corporation, ata6616 Datasheet - Page 235

• Manufacturer Part Number: ata6616
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

4.18.11.7
9132A–AUTO–10/08
DRAFT
AMISCR – Analog Miscellaneous Control Register
• Bits 7:3 – Reserved Bits
These bits are reserved for future use. For compatibility with future devices, they must be written
to zero when AMISCR is written.
• Bit 2 – AREFEN: External Voltage Reference Input Enable
When this bit is written logic one, the voltage reference for the ADC is input from AREF pin as
described in
AREF higher than (AVcc - 1V) is not recommended, as this will affect ADC accuracy. The inter-
nal voltage reference options may not be used if an external voltage is being applied to the
AREF pin. It is recommended to use DIDR register bit function (digital input disable) when ARE-
FEN is set.
• Bit 1 – XREFEN: Internal Voltage Reference Output Enable
When this bit is written logic one, the internal voltage reference 1.1V or 2.56V is output on XREF
pin as described in
tion (digital input disable) when XREFEN is set.
Bit
Read/Write
Initial Value
Table 4.18.10 on page
R
7
0
-
Table 4.18.10 on page
R
6
0
-
ATA6616/ATA6617 [Preliminary]
R
5
0
-
229. If active channels are used, using AVcc or an external
229. It is recommended to use DIDR register bit func-
R
4
0
-
R
3
0
-
AREFEN XREFEN
R/W
2
0
R/W
1
0
ISRCEN
R/W
0
0
AMISCR
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