Philips Semiconductors
Product data sheet
NE1619
HECETA4 Temperature and voltage monitor
2004 Oct 05
11
Table 2. Configuration Register (CR, 40h, default = 0000 1000)
BIT
NAME
R/W
DESCRIPTION
0
START
R/W
Logic 1 enables startup of monitor device, logic 0 places the device in standby mode.
Powerup default = 0.
At startup, limit checking functions and scanning begins. Note, all High and Low limits
should be set into the ASIC prior turning on this bit.
1
Reserved
Read
Power-up default = 0.
2
Reserved
Read
Power-up default = 0.
3
Reserved
Read
Power-up default = 1.
4
RESET
R/W
Setting this bit generates a minimum 20ms low pulse on the Reset pin, if the reset
function is enabled. Power-up default = 0.
5
12V
IN
/VID4
SELECT
R/W
Selects whether pin 11 acts as a 12 volt analog input monitoring pin, or as a VID[4] input.
This pin defaults to the 12 volt analog input. Powerup default = 0.
6
Reserved
Read
Powerup default = 0.
7
Initialization
R/W
Logic 1 restores powerup default values to the configuration register and the status
registers. This bit automatically clears itself. Powerup default = 0.
Table 3. Status Register 1 (SR1, 41h, default = 0000 0000)
BIT
NAME
R/W
DESCRIPTION
0
+2.5V_ERROR
Read
A one indicates 2.5V
IN
High or Low limit has been exceeded.
1
VCCP_ERROR
Read
A one indicates V
CCPVIN
High or Low limit has been exceeded.
2
+3.3V_ERROR
Read
A one indicates 3.3V
IN
High or Low limit has been exceeded.
3
+5V_ERROR
Read
A one indicates 5V
IN
High or Low limit has been exceeded.
4
Internal Temp Error
Read
A one indicates internal or local temp High or Low limit has been exceeded.
5
External Temp Error
Read
A one indicates external or remote temp High or Low limit has been exceeded.
6
Reserved
Read
7
Reserved
Read
Table 4. Status Register 2 (SR2, 42h, default = 0000 0000)
BIT
NAME
R/W
DESCRIPTION
0
+12V_ERROR
Read
A one indicates 12V
IN
High or Low limit has been exceeded.
1
VDD_ERROR
Read
A one indicates V
DD
High or Low limit has been exceeded.
2
Reserved
Read
Undefined.
3
Reserved
Read
Undefined.
4
Reserved
Read
Undefined.
5
Reserved
Read
Undefined.
6
Remote Diode Fault
Read
A one indicates either a short or open circuited fault on the remote thermal diode inputs.
7
Reserved
Read
Undefined.
Table 5. VID (VID, 47h, default = 0000 VID[3:0] )
BIT
NAME
R/W
DESCRIPTION
03
VID[0:3]
Read
The VID[0:3] inputs from Pentium/PRO power supplies ID to indicate the operating
voltage (e.g. 1.5V to 2.9V). Power-up default = VID[0:3].
46
Reserved
Read
Undefined.
7
RESET
ENABLE
Read
When set to 1, enables the RESET
pin output function.
This bit defaults to 0 at Powerup and enables addressing function.
Table 6. VID4 (VID4, 49h, default = 1000 000VID[4] )
BIT
NAME
R/W
DESCRIPTION
0
VID4
Read
VID4 input, if selected, from Pentium/PRO power supplied ID.
Power-up default = 0 and pin 11 is not selected for VID4.
17
Reserved
Read
Power-up default = 1000 000
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