w83795g Winbond Electronics Corp America, w83795g Datasheet - Page 108

• Manufacturer Part Number: w83795g
• Description: Nuvoton H/w Monitor
• Manufacturer: Winbond Electronics Corp America

F1OPFP - Bank 2 Address 18
F2OPFP - Bank 2 Address 19
F3OPFP - Bank 2 Address 1A
F4OPFP - Bank 2 Address 1B
Type:
Reset:
* The default value of B version W83795G/ADG is 85h.
The clock source selected by CKSEL will be divided by the divisor and used as a fan PWM output
frequency. There are 2 divisors depending on CKSEL.
If CKSEL equals 1, then the output clock is simply equal to 130.21/ (Divisor+1) KHz (@ frequency of
CLKIN is 33MHz).
If CKSEL equals 0, the output clock is 1KHz/MappedDivisor. MappedDivisor depends on Divisor[3:0]
and is described in the table below.
Divisor[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
10.1.2.10. Fan Output Start-up Value (FOSV)
DEFAULT
NAME
BIT
6-0
7
BIT
Init Reset (CR01.Bit7) is set,
Read / Write
3VSB Rising,
3VDD Rising @ RST_VDD_MD (CR01.Bit5) set,
SYSRSTIN# Falling @ SYSRST_MD (CR01.Bit6) set.
CKSEL – Clock source select.
Divisor – Clock frequency Divisor.
CLKSEL
0
1
CKSEL
Mapped
Divisor
1
2
3
4
5
6
7
8
7
1
6
0
HEX
HEX
14.318MHz
1.024KHz
55.93Kz
HEX
HEX
Output
Frequency
1024Hz
512Hz
341Hz
256Hz
205Hz
171Hz
146Hz
128Hz
5
0
F1OPFP – F8OPFP
F5OPFP - Bank 2 Address 1C
F6OPFP - Bank 2 Address 1D
F7OPFP - Bank 2 Address 1E
F8OPFP - Bank 2 Address 1F
- 108 –
DESCRIPTION
4
0
24MHz
1.024KHz
93.75KHz
Divisor[3:0]
1000
1001
1010
1011
1100
1101
1110
1111
CLKIN Frequency
Divisor
3
0
Mapped
Divisor
12
16
32
64
128
256
512
1024
33MHz
1.024KHz
130.21KHz
HEX
HEX
HEX
HEX
2
1
W83795G/ADG
Output
Frequency
85Hz
64Hz
32Hz
16Hz
8Hz
4Hz
2Hz
1Hz
1
0
48MHz
1KHz
125KHz
Revision 1.41
Aug/2/2010
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