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MCP9902 Datasheet(PDF) 25 Page - Microchip Technology

Part # MCP9902
Description  Multi-Channel Low-Temperature Remote Diode Sensor
PDF  50 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP9902 Datasheet(HTML) 25 Page - Microchip Technology

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 2015-2016 Microchip Technology Inc.
DS20005382C-page 25
MCP9902/3/4
REGISTER 5-6:
CONFIG: CONFIGURATION REGISTER (ADDRESSES 03H AND 09H)
RW-0
RW-0
RW-0
RW-0
RW-0
RW-0
RW-0
RW-0
MSKAL
R/S
AT/THM
RECD1
RECD2
RANGE
DA_DIS
APDD
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as 0
-n = Value at POR
‘1’ = bit is set
‘0’ = Bit is cleared
x = Bit in unknown
7
MSKAL
: Masks the ALERT/THERM2 pin from asserting when the ALERT/THERM2 pin is in interrupt
mode. This bit has no effect when the ALERT/THERM2 pin is in comparator mode.
1
= The ALERT/THERM2 pin is masked and will not be asserted for any interrupt condition when the
ALERT/THERM2 pin is in interrupt mode. The Status Register will be updated normally.
0
= The ALERT/THERM2 pin is not masked. If any of the appropriate status bits are set, the
ALERT/THERM2 pin will be asserted.
6
R/S
: Controls Active/Standby states
1
= The device is in Standby state and not converting (unless a one-shot has been commanded)
0
= The device is in Active state and converting on all channels
5
AT/THM
: Controls the operation of the ALERT/THERM2 pin
1
= The ALERT/THERM2 pin acts in comparator mode as described in Section 4.6.2
“ALERT/THERM2 Pin In THERM Mode”
. In this mode the MASK_ALL bit is ignored.
0
= The ALERT/THERM2 pin acts in interrupt mode as described in Section 4.6.1 “ALERT/THERM2
Pin Interrupt Mode”
.
4
RECD1
: Disables the Resistance Error Correction (REC) for the External Diode 1
1
= REC is disabled for the External Diode 1
0
= REC is enabled for the External Diode 1
3
RECD2
: Disables the Resistance Error Correction (REC) for External Diode 2 and External Diode 3
1
= REC is disabled for External Diode 2 and External Diode 3
0
= REC is enabled for External Diode 2 and External Diode 3
2
RANGE
: Configures the measurement range and data format of the temperature channels
1
= The temperature measurement range is -64°C to +191.875°C and the data format is offset binary
(see Table 4-7)
0
= The temperature measurement range is 0°C to +127.875°C and the data format is binary
1
DA_DIS
: Disables the dynamic averaging feature on all temperature channels
1
= The dynamic averaging feature is disabled
0
= The dynamic averaging feature is enabled. All temperature channels will be converted with an
averaging factor that is based on the conversion rate as shown in Table 4-1.
0
APDD
(MCP9904 only): Disables the anti-parallel diode operation
1
= Anti-parallel diode mode is disabled. Only one external diode will be measured on the DP2 and
DN2 pins.
0
= Anti-parallel diode mode is enabled. Two external diodes will be measured on the DP2 and DN2 pins.



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