EMC6D100-DK SMSC [SMSC Corporation], EMC6D100-DK Datasheet - Page 48

• Manufacturer Part Number: EMC6D100-DK
• Description: ENVIRONMENTAL MONITORING AND CONTROL DEVICE WITH AUTOMATIC FAN CAPABILITY
• Manufacturer: SMSC [SMSC Corporation]

8.13
8.14
SMSC EMC6D100/EMC6D101
REGISTER
REGISTER
ADDRESS
ADDRESS
7Dh
43h
BIT
3-7
0
1
2
Register 7Dh: Interrupt Status Register 3
Note 1: This register is cleared on a read if no events are active
Note: this register only applies to the EMC6D100.
The Interrupt Status Register 3 bits are automatically set by the EMC6D100 whenever the 1.5V, 1.8V, or
3.3V input voltages violate the limits set in the limit and parameter registers.
This register holds a set bit until the event is read by software. The contents of this register is cleared (set
to 0) automatically by the EMC6D100 after it is read by software, if the voltage no longer violates the limit
set in the limit and parameter register. Once set, the Interrupt Status Register 3 bits remain set until a
read event occurs, even if the voltage or temperature no longer violates the limits set in the limit and
parameter registers.
This register is read only – a write to this register has no effect.
Register 43h: VID
The VID register contains the values of EMC6D100/EMC6D101 VID0-VID4 input pins. This register
indicates the status of the VID lines that interconnect the processor to the Voltage Regulator Module
(VRM). Software uses the information in this register to determine the voltage that the processor is
designed to operate at. With this information, software can then dynamically determine the correct values
to place in the Vccp Low Limit and Vccp High Limit registers.
This register is read only – a write to this register has no effect.
+1.8V_Error
+3.3V_Error
+1.5v_Error
Reserved
WRITE
WRITE
READ/
READ/
R-C
NAME
R
1
Register 3
REGISTER
REGISTER
Interrupt
VID0-4
Status
NAME
NAME
R/W
R
R
R
R
DEFAULT
(MSB)
(MSB)
BIT 7
RES
BIT 7
RES
DATASHEET
0
0
0
0
BIT 6
RES
BIT 6
RES
The EMC6D100 automatically sets this bit to 1 when the 1.5V
input voltage is less than or equal to the limit set in the 1.5V
Low Limit register or greater than the limit set in the 1.5V
High Limit register.
The EMC6D100 automatically sets this bit to 1 when the 1.8V
input voltage is less than or equal to the limit set in the 1.8V
Low Limit register or greater than the limit set in the 1.8V
High Limit register.
The EMC6D100 automatically sets this bit to 1 when the 3.3V
input voltage is less than or equal to the limit set in the 3.3V
Low Limit register or greater than the limit set in the 3.3V
High Limit register.
Reserved
Page 48
BIT 5
BIT 5
RES
RES
BIT 4
BIT 4
VID4
RES
BIT 3
BIT 3
VID3
RES
DESCRIPTION
Environmental Monitoring and Control Device
BIT 2
BIT 2
VID2
33V
VID1
BIT 1
BIT 1
18V
(LSB)
(LSB)
BIT 0
BIT 0
VID0
15V
Rev. 09-09-04
DEFAULT
DEFAULT
Datasheet
VALUE
VALUE
00h
N/A