MCP9808 MICROCHIP [Microchip Technology], MCP9808 Datasheet - Page 19

• Manufacturer Part Number: MCP9808
• Manufacturer: MICROCHIP [Microchip Technology]

REGISTER 5-2:
© 2011 Microchip Technology Inc.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Crit. Lock: T
0 = Unlocked. T
1 = Locked. T
When enabled, this bit remains set to ‘1’ or locked until cleared by an internal Reset
“Summary of Power-on
This bit can be programmed in Shutdown mode.
Win. Lock: T
0 = Unlocked; T
1 = Locked; T
When enabled, this bit remains set to ‘1’ or locked until cleared by a Power-on Reset
“Summary of Power-on
This bit can be programmed in Shutdown mode.
Int. Clear: Interrupt Clear bit
0 = No effect (power-up default)
1 = Clear interrupt output; when read, this bit returns to ‘0’
This bit can not be set to ‘1’ in Shutdown mode, but it can be cleared after the device enters Shutdown
mode.
Alert Stat.: Alert Output Status bit
0 = Alert output is not asserted by the device (power-up default)
1 = Alert output is asserted as a comparator/Interrupt or critical temperature output
This bit can not be set to ‘1’ or cleared to ‘0’ in Shutdown mode. However, if the Alert output is config-
ured as Interrupt mode, and if the host controller clears to ‘0’, the interrupt, using bit 5 while the device
is in Shutdown mode, then this bit will also be cleared ‘0’.
Alert Cnt.: Alert Output Control bit
0 = Disabled (power-up default)
1 = Enabled
This bit can not be altered when either of the Lock bits are set (bit 6 and bit 7).
This bit can be programmed in Shutdown mode, but the Alert output will not assert or deassert.
Alert Sel.: Alert Output Select bit
0 = Alert output for T
1 = T
When the Alarm Window Lock bit is set, this bit cannot be altered until unlocked (bit 6).
This bit can be programmed in Shutdown mode, but the Alert output will not assert or deassert.
Alert Pol.: Alert Output Polarity bit
0 = Active-low (power-up default; pull-up resistor required)
1 = Active-high
This bit cannot be altered when either of the Lock bits are set (bit 6 and bit 7).
This bit can be programmed in Shutdown mode, but the Alert output will not assert or deassert.
Alert Mod.: Alert Output Mode bit
0 = Comparator output (power-up default)
1 = Interrupt output
This bit cannot be altered when either of the Lock bits are set (bit 6 and bit 7).
This bit can be programmed in Shutdown mode, but the Alert output will not assert or deassert.
A
CONFIG: CONFIGURATION REGISTER (→ ADDRESS ‘0000 0001’b)
> T
CRIT
CRIT
UPPER
CRIT
UPPER
only (T
CRIT
UPPER
Lock bit
register can not be written
and T
register can be written (power-up default)
and T
UPPER
UPPER
and T
Default”).
Default”).
LOWER
LOWER
, T
LOWER
and T
LOWER
Window Lock bit
registers can not be written
LOWER
registers can be written (power-up default)
and T
temperature boundaries are disabled)
CRIT
(power-up default)
MCP9808
DS25095A-page 19
(Section 5.3
(Section 5.3