MCP9802 Microchip Technology Inc., MCP9802 Datasheet - Page 13

• Manufacturer Part Number: MCP9802
• Description: 2-wire High-accuracy Temperature Sensor
• Manufacturer: Microchip Technology Inc.

4.3.4
The MCP9800/1/2/3 has an 8-bit read/write configura-
tion register (CONFIG) that allows the user to select the
different features. These features include shutdown,
ALERT output select as comparator or interrupt output,
ALERT output polarity, fault queue cycle, temperature
measurement resolution and One-shot mode (single
conversion while in shutdown). These functions are
described in detail in the following sections.
REGISTER 4-5:
 2004 Microchip Technology Inc.
bit 7
bit 5-6
bit 3-4
bit 2
bit 1
bit 0
SENSOR CONFIGURATION
REGISTER (CONFIG)
CONFIGURATION REGISTER (CONFIG)
ONE-SHOT bit
1 = Enabled
0 = Disabled (Power-up default)
00 = 9 bit (Power-up default)
01 = 10 bit
10 = 11 bit
11 = 12 bit
FAULT QUEUE bit
00 = 1 (Power-up default)
01 = 2
10 = 4
11 = 6
ALERT POLARITY bit
1 = Active-High
0 = Active-Low (Power-up default)
COMP/INT bit
1 = Interrupt Mode
0 = Comparator Mode (Power-up default)
SHUTDOWN bit
1 = Enable
0 = Disable (Power-up default)
Legend:
R = Readable bit
- n = Value at POR
bit 7
One-Shot
R/W-0
ADC RESOLUTION bit
R/W-0
Resolution
R/W-0
W = Writable bit
‘1’ = Bit is set
R/W-0
Fault Queue
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
MCP9800/1/2/3
Polarity
ALERT
R/W-0
x = Bit is unknown
COMP/
R/W-0
INT
DS21909B-page 13
R/W-0
Shut-
down
bit 0