LM63CIMAX National Semiconductor, LM63CIMAX Datasheet - Page 20

• Manufacturer Part Number: LM63CIMAX
• Description: IC,Motor Controller,MOS,SOP,8PIN
• Manufacturer: National Semiconductor

Specifications of LM63CIMAX

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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ADDRESS
ADDRESS
47
MSB and ensure MSB and LSB are from the same reading)
49
00
05 (0B)
2.0 LM63 Registers
Tachometer Count And Limit Registers
Local Temperature And Local High Setpoint Registers
HEX
HEX
HEX
Hex
Hex
47
46
49
48
00
05
TACHOMETER COUNT (MSB) and 46
TACHOMETER LIMIT (MSB) and 48
LOCAL TEMPERATURE REGISTER (8-bits)
HEX
LOCAL HIGH SETPOINT REGISTER (8-bits)
Read/
Write
Read
Read
Read
Read/
Write
Only
Only
Only
Read
R/W
R/W
R/W
Only
R/W
Bits
7:0
7:2
1:0
7:0
7:2
1:0
Bits
7:0
7:0
Value
0xFF
0xFF
POR
Value
N/A
N/A
POR
0x46
(70˚)
00
N/A
(Continued)
Count (MSB)
Reading (8-bit)
Count (LSB)
Tachometer
Tachometer
Tachometer
Edge Count
Tachometer
Tachometer
Limit MSB)
Limit (LSB)
[Reserved]
Temperature
Local HIGH
Name
Setpoint
Name
Local
HEX
HEX
TACHOMETER LIMIT (LSB) REGISTERS
TACHOMETER COUNT (LSB) REGISTERS (16 bits: Read LSB first to lock
These registers contain the current 16-bit Tachometer Count, representing
the period of time between tach pulses.
Note that the 16-bit tachometer MSB and LSB are reversed from the
16-bit temperature readings.
Note: If PWM_Clock_Select = 360 kHz, then Tach_Count_Multiple = 1
regardless of the setting of these bits.
These registers contain the current 16-bit Tachometer Count, representing
the period of time between tach pulses. Fan RPM = (f
(Tachometer Count), where f = 1 for 2 pulses/rev fan; f = 2 for 1 pulse/rev
fan; and f = 2/3 for 3 pulses/rev fan. See the Applications Notes section
for more tachometer information. Note that the 16-bit tachometer MSB and
LSB are reversed from the 16 bit temperature readings.
Not Used.
8-bit integer representing the temperature of the LM63 die.
High Setpoint for the internal diode.
Bits
00:
01:
10:
11:
20
Edges Used
2
3
5
Description
Reserved - do not use
Description
Tach_Count_Multiple
4
2
1
*
5,400,000) /