EMC2300-AZC-TR SMSC, EMC2300-AZC-TR Datasheet - Page 70

• Manufacturer Part Number: EMC2300-AZC-TR
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC2300-AZC-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Revision 0.32 (06-23-08)
8.2.24
Register
Address
BIT
BIT
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
81h
TACH1
TACH2
TACH3
TACH4
NAME
NAME
TACH
RES
RES
RES
T1H
T2H
T3H
T4H
Read/
T1L
T2L
T3L
T4L
Write
R/W
Register 81h: TACH_PWM Association Register
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
This register is used to associate a PWM with a tachometer input. This association is used by the fan
logic to determine when to prevent a bit from being set in the interrupt status registers.
The fan tachometer will not cause a bit to be set in the interrupt status register:
g. if the current value in Current PWM Duty registers is 00h or
h. if the fan is disabled via the Fan Configuration Register.
Note: A bit will never be set in the interrupt status for a fan if its tachometer minimum is set to FFFFh.
See bit definition below.
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
TACH_PWM Association
R
R
R
R
R
Table 8.46 Register 81h: TACH_PWM Association Register
Register Name
Table 8.47 TACH_PWM Association Register Bits
DEFAULT
DEFAULT
Table 8.45 Interrupt Enable 2 Register Bits
0
1
1
1
1
0
0
0
0
0
1
0
0
1
0
1
Group TACH INT# enable- When set enables out-of-limit TACH
measurements assert the INT# pin.
When set, enables the TACH1 tachometer to update status registers and
generate interrupts.
When set, enables the TACH2 tachometer to update status registers and
generate interrupts.
When set, enables the TACH3 tachometer to update status registers and
generate interrupts.
When set, enables the TACH4 tachometer to update status registers and
generate interrupts.
Reserved
Reserved
Reserved
Determine which PWM outputs are associated with the TACH1 input. See
Table 8.48
Determine which PWM outputs are associated with the TACH2 input. See
Table 8.48
Determine which PWM outputs are associated with the TACH3 input. See
Table 8.48
Determine which PWM outputs are associated with the TACH4 input. See
Table 8.48
DATASHEET
(MSb)
Bit 7
T4H
70
Bit 6
Fan Control Device with High Frequency PWM and Temperature Monitors
T4L
Bit 5
T3H
DESCRIPTION
DESCRIPTION
Bit 4
T3L
Bit 3
T2H
Bit 2
T2L
Bit 1
T1H
(LSb)
SMSC EMC2300
Bit 0
T1L
Datasheet
Default
Value
A4h