Intel Itanium 9140M NE80567KF028009 Manual Do Utilizador
Códigos do produto
NE80567KF028009
88
Dual-Core Intel
®
Itanium
®
Processor 9000 and 9100 Series Datasheet
System Management Feature Specifications
All of the commands are for reading or writing registers in the thermal sensor except
the one-shot command (OSHT). The one-shot command forces the immediate start of
a new voltage-to-temperature conversion cycle. If a conversion is in progress when the
one-shot command is received, then the command is ignored. If the thermal sensing
device is in standby mode when the one-shot command is received, a conversion is
performed and the sensor returns to standby mode. If the thermal sensor is in auto-
convert mode and is between conversions, then the conversion rate timer resets, and
the next automatic conversion takes place after a full delay elapses. Please refer to
the one-shot command (OSHT). The one-shot command forces the immediate start of
a new voltage-to-temperature conversion cycle. If a conversion is in progress when the
one-shot command is received, then the command is ignored. If the thermal sensing
device is in standby mode when the one-shot command is received, a conversion is
performed and the sensor returns to standby mode. If the thermal sensor is in auto-
convert mode and is between conversions, then the conversion rate timer resets, and
the next automatic conversion takes place after a full delay elapses. Please refer to
for further detail on standby and auto-convert modes.
The default command after reset is the reserved value (00h). After reset, receive byte
packets will return invalid data until another command is sent to the thermal sensing
device.
packets will return invalid data until another command is sent to the thermal sensing
device.
6.7
Thermal Sensing Device Registers
The system management software can configure and control the thermal sensor by
writing to and interacting with different registers in the thermal sensor. These registers
include a thermal reference register, two thermal limit registers, a status register, a
configuration register, a conversion rate register, and other reserved registers. The
following subsections describe the registers in detail.
writing to and interacting with different registers in the thermal sensor. These registers
include a thermal reference register, two thermal limit registers, a status register, a
configuration register, a conversion rate register, and other reserved registers. The
following subsections describe the registers in detail.
6.7.1
Thermal Reference Registers
The processor core and thermal sensing device internal thermal reference registers
contain the thermal reference value of the thermal sensing device and the processor
core thermal diodes. This value ranges from +127 to –128 decimal and is expressed as
a two’s complement, eight-bit number. These registers are saturating, that is, values
above 127 are represented at 127 decimal, and values below –128 are represented as
–128 decimal.
contain the thermal reference value of the thermal sensing device and the processor
core thermal diodes. This value ranges from +127 to –128 decimal and is expressed as
a two’s complement, eight-bit number. These registers are saturating, that is, values
above 127 are represented at 127 decimal, and values below –128 are represented as
–128 decimal.
Table 6-13. Command Byte Bit Assignment
Register
Command
Reset State
Function
RESERVED
00h
N/A
Reserved for future use.
RRT
01h
N/A
Read processor core thermal data.
RS
02h
N/A
Read status byte (flags, busy signal).
RC
03h
0000 0000
Read configuration byte.
RCR
04h
0000 0010
Read conversion rate byte.
RESERVED
05h
0111 1111
Reserved for future use.
RESERVED
06h
1100 1001
Reserved for future use.
RRHL
07h
0111 1111
Read processor core thermal diode T
HIGH
limit.
RRLL
08h
1100 1001
Read processor core thermal diode T
LOW
limit.
WC
09h
N/A
Write configuration byte.
WCR
0Ah
N/A
Write conversion rate byte.
RESERVED
0Bh
N/A
Reserved for future use.
RESERVED
0Ch
N/A
Reserved for future use.
WRHL
0Dh
N/A
Write processor core thermal diode T
HIGH
limit.
WRLL
0Eh
N/A
Write processor core thermal diode T
LOW
limit.
OSHT
0Fh
N/A
One shot command (use send byte packet).
RESERVED
10h – FFh
N/A
Reserved for future use.