ADUC847 Analog Devices, ADUC847 Datasheet - Page 40

• Manufacturer Part Number: ADUC847
• Description: Precision Analog Microcontroller: 12MIPS 8052 Flash MCU + 10-Ch 24-Bit ADC + 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC847

• Mcu Core: 8052
• Mcu Speed (mips): 12
• Sram (bytes): 2304Bytes
• Gpio Pins: 34
• Adc # Channels: 10
• Other: PWM

ADuC845/ADuC847/ADuC848
ADCSTAT (ADC STATUS REGI
This SFR reflects the status of both ADCs including data ready, c
in
SFR
Pow
Bit A
Tabl
Bit N
7
6
5
4
3
2
1
0
clu
er-On Default:
e 23. ADCSTAT SFR Bit Designation
Address:
ding REFIN± reference detect and conversion overflow/un
ddressable:
o.
Name
RDY0
RDY1
CAL
NOXREF
ERR0
ERR1
–––
–––
D8H
00H
Yes
Description
Ready Bit for the Primary ADC.
Set by hardware on completion of conv
Cleared directly b
inhibited from writing further re
Ready Bit for Auxiliary (ADuC845 only)
Same definition as RDY0 referred to the
Calibration Status Bit.
Set by hardware on completion of cali
Cleared indirectly by a write to the
Note that calibration with the temperatur
No External Reference Bit (only active if
Set to indicate that one or both of the REFIN pin
When set, conversion results are clam
Cleared to indicate valid V
Primary ADC Error Bit.
Set by hardware to indicate that the
all 1s. After a calibration, this bit also flags er
Cleared by a write to the mode bits to in
Auxiliary ADC Error Bit. Same de
Not Implemented. Write Don’t Care.
Not Implemented. Write Don’t Care.
STER)
y the user, or indirectly by a write to
REF
.
finition as ERR0 referred to the auxiliary ADC. Valid on the ADuC845 only.
sults to its data or cal
mode bits to start
Rev. B | Page 40 of 108
result written to t
ped to all 1s. On
bration.
ADC.
derflow fl s.
ersion or calib
primary o u
auxiliary ADC
alibratio
itiate a c
e sensor selected (auxiliary ADC on the ADuC845 only) fails to complete.
ror conditions that caused the calibration registers not to be written.
s is flo
n, a d various (ADC-related) error and warning conditions
on
ag
r a xiliary (ADuC845 only) ADC is active).
version or calibration.
n
ibration registe
another ADC conversion or
. Valid on the ADuC845 only.
ration.
ly detects invalid REFIN
the mode bits, to start calibration. The primary ADC is
he primary ADC data registers has been
ating or the applied voltage is below a specified thresh
rs until the RDY0 bit is cleared.
±, does not check REFIN2±.
calibration.
clamped to all 0s or
old.