MCP98243 Microchip Technology Inc., MCP98243 Datasheet - Page 18

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

MCP98243
5.1.1
This is a read-only register used to identify the
temperature sensor capability. In this case, the
MCP98243 is capable of providing temperature at
0.25°C resolution, measuring temperature below and
above 0°C, providing ±1°C and ±2°C accuracy over the
active and monitor temperature ranges (respectively)
and providing user-programmable temperature event
boundary trip limits.
Capability register. These functions are described in
further detail in the following sections.
REGISTER 5-2:
DS22153A-page 18
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-6
bit 5
bit 4-3
bit 2
bit 1
bit 0
U-0
U-0
—
—
CAPABILITY REGISTER
Unimplemented: Read as ‘0’
High Voltage Input
0 =
1 =
Resolution:
00 = 0.5°C
01 = 0.25°C (power up default)
10 = 0.125°C
11 = 0.0625°C
These bits reflect the selected resolution (see Section 5.2.4 “Temperature Resolution”)
Temperature Measurement Range (Meas. Range):
0 =
1 =
Accuracy:
0 =
1 =
Temperature Alarm:
0 =
1 =
U-0
U-0
—
—
CAPABILITY REGISTER (READ-ONLY) → ADDRESS ‘0000 0000’b
Pin A0 does not accept High Voltage
Pin A0 accepts High Voltage for the internal EEPROM Write Protect feature (power-up default)
T
The part can measure temperature below 0°C (power-up default)
Accuracy → ±2°C from +75°C to +95°C (Active Range) and ±3°C from +40°C to +125°C
(Monitor Range)
Accuracy → ±1°C from +75°C to +95°C (Active Range) and ±2°C from +40°C to +125°C
(Monitor Range)
No defined function (This bit will never be cleared or set to ‘0’)
The part has temperature boundary trip limits (T
temperautre event output (JC 42.4 required feature)
A
Register 5-2
= 0 (decimal) for temperature below 0°C
W = Writable bit
‘1’ = Bit is set
V
U-0
R-1
—
HV
describes the
U-0
R-0
—
Resolution
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U-0
R-1
—
Meas Range
UPPER
U-0
R-1
—
/T
LOWER
© 2009 Microchip Technology Inc.
x = Bit is unknown
Accuracy
/T
CRIT
U-0
R-1
—
registers) and a
Temp Alarm
U-0
R-1
—
bit 8
bit 0