MCP98243 Microchip Technology Inc., MCP98243 Datasheet - Page 20

• Manufacturer Part Number: MCP98243
• Description: Memory Module Temperature Sensor W/ Eeprom For Spd
• Manufacturer: Microchip Technology Inc.

MCP98243
5.1.2
The MCP98243 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:
DS22153A-page 20
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-11
bit 10-9
bit 8
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
Unimplemented: 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”)
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.
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”).
UPPER
Win. Lock
R/W-0
U-0
LOWER
—
CONFIGURATION REGISTER (CONFIG) → ADDRESS
Continuous Conversion (power-up default)
Shutdown (Low-Power mode)
chatter
and T
temperature boundary or
HYST
LOWER
W = Writable bit
‘1’ = Bit is set
when
Int. Clear
R/W-0
)”. The Continuous
U-0
—
Limit Hysteresis (T
the
ambient
Event Stat.
U-0
R-0
—
HYST
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
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
Configuration”).
U-0
LOWER
—
and T
Event Sel.
R/W-0
R/W-0
(see Section 5.2.3 “Event Output
converted
register
CRIT
to prevent an accidental rewrite.
T
‘0000 0001’b
HYST
© 2009 Microchip Technology Inc.
(T
x = Bit is unknown
A
Event Pol.
temperature
)
R/W-0
R/W-0
holds
the
Event Mod.
data
R/W-0
SHDN
R/W-0
previous
UPPER
bit 8
bit 0
(see
,