MCP98242T-CE/ST Microchip Technology, MCP98242T-CE/ST Datasheet - Page 15

• Manufacturer Part Number: MCP98242T-CE/ST
• Description: Board Mount Temperature Sensors JEDEC DIMM SER Outpt Temp Snsr SPD EEPROM
• Manufacturer: Microchip Technology

Specifications of MCP98242T-CE/ST

• Full Temp Accuracy: +/- 2 C
• Package / Case: TSSOP-8
• Digital Output - Bus Interface: Serial (2-Wire, I2C)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.1.2
The MCP98242 has a 16-bit Configuration register
(CONFIG) that allows the user to set various functions
for a robust temperature monitoring system. Bits 10
thru 0 are used to select Event output boundary
hysteresis, device Shutdown or Low-Power mode,
temperature boundary and critical temperature lock,
temperature Event output enable/disable. In addition,
the user can select the Event output condition (output
set for T
T
output polarity and mode (Comparator Output or
Interrupt Output mode).
The temperature hysteresis bits 10 and 9 can be used
to
temperature gradually changes beyond the user-
specified temperature boundary (see Section 5.2.2
“Temperature Hysteresis (T
REGISTER 5-3:
© 2008 Microchip Technology Inc.
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-11
bit 10-9
bit 8
bit 7
CRIT
Crit. Lock
prevent
R/W-0
U-0
only), read Event output status and set Event
—
UPPER
SENSOR CONFIGURATION
REGISTER (CONFIG)
output
and T
Unimplements: Read as ‘0’
T
00 = 0°C (power-up default)
01 = 1.5°C
10 = 3.0°C
11 = 6.0°C
(Refer to Section 5.2.3 “Event Output Configuration”)
Shutdown Mode (SHDN):
0 =
1 =
In shutdown, all power-consuming activities are disabled, though all registers can be written to or read.
This bit cannot be set ‘1’ when either of the lock bits is set (bit 6 and bit 7). However, it can be cleared
‘0’ for Continuous Conversion while locked. (Refer to Section 5.2.1 “Shutdown Mode”)
T
0 =
1 =
When enabled, this bit remains set ‘1’ or locked until cleared by internal reset (Section 5.4 “Summary
of Temperature Sensor Power-on Default”). This bit does not require a double-write.
UPPER
CRIT
Win. Lock
R/W-0
U-0
LOWER
—
CONFIGURATION REGISTER (CONFIG) → ADDRESS ‘0000 0001’b
Continuous Conversion (power-up default)
Shutdown (Low-Power mode)
Unlocked. T
Locked. T
Lock Bit (Crit. Lock):
chatter
and T
temperature boundary or
HYST
LOWER
W = Writable bit
‘1’ = Bit is set
CRIT
when
Int. Clear
R/W-0
CRIT
)”. The Continuous
U-0
—
register can not be written
Limit Hysteresis (T
register can be written. (power-up default)
the
ambient
Event Stat.
R/W-0
U-0
—
HYST
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
Event Cnt.
R/W-0
):
Conversion or Shutdown mode is selected using bit 8.
In Shutdown mode, the band gap temperature sensor
circuit stops converting temperature and the Ambient
Temperature
successfully
Section 5.2.1 “Shutdown Mode”). Bits 7 and 6 are
used to lock the user-specified boundaries T
T
Bits 5 thru 0 are used to configure the temperature
Event output pin. All functions are described in
Register 5-3 (see Section 5.2.3 “Event Output
Configuration”).
U-0
LOWER
—
and T
Event Sel.
R/W-0
R/W-0
converted
register
CRIT
to prevent an accidental rewrite.
T
HYST
(T
x = Bit is unknown
MCP98242
A
Event Pol.
temperature
)
R/W-0
R/W-0
holds
DS21996B-page 15
the
Event Mod.
data
R/W-0
SHDN
R/W-0
previous
UPPER
bit 8
bit 0
(see
,