TCN75A_1 Datasheet, PDF (18/40 Pages) Microchip Technology – 2-Wire Serial Temperature Sensor

TCN75A
5.3.2
SENSOR CONFIGURATION
REGISTER (CONFIG)
The TCN75A has an 8-bit read/write Configuration
register 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 5-3: CONFIGURATION REGISTER (CONFIG) — ADDRESS <0000 0001>b
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
One-Shot
Resolution
Fault Queue
ALERT
Polarity
COMP/INT
bit 7
R/W-0
Shutdown
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6-5
bit 4-3
bit 2
bit 1
bit 0
ONE-SHOT bit
1 = Enabled
0 = Disabled (Power-up default)
 ADC RESOLUTION bits
00 = 9 bit or 0.5°C (Power-up default)
01 = 10 bit or 0.25°C
10 = 11 bit or 0.125°C
11 = 12 bit or 0.0625°C
FAULT QUEUE bits
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)
DS21935D-page 18
 2010 Microchip Technology Inc.