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參數(shù)資料
| 型號： | G760A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Fan Speed PWM Controller |
| 中文描述： | 風(fēng)扇轉(zhuǎn)速PWM控制器 |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 173K |
| 代理商： | G760A |
Ver 4.3
Oct 28, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G760A
Global Mixed-mode Technology Inc.
Internal Registers
This IC provides 3 SMBus registers.
1.Programmed fan speed register:(SET_CNT,address:00b)
This register is a read/write register, it contains the
count number of the desired fan speed. Power up
default is FFh.
2.Actual fan speed register: (ACT_CNT, address: 01b)
This register is read only. It contains the count number of
the actual fan speed. Power up default is FFh.
3.Fan status register: (FAN_STA , address : 10b)
This register is read only. Its bit 0 is set to 1 when
the actual fan speed is ±20% outside the desired
speed. Its bit 1 is set to 1 when fan speed is be-
low
1920 rpm. Power up default is 10b.
SMBus Address
The SMBus address of this chip is fixed to7Ch (01111100b) for write and 7Dh(01111101b) for read.
SMBus Timing
(a) Typical Pointer Set Followed by Immediate Read
(b) Typical 1-Byte Read with Preset Pointer
(a) Typical Pointer Set Followed by Immediate Read
(b) Register Write
9
1
9
1
D0
Master
Address Byte
R/W
G760
Data Byte
Master
D7
Master
0
1
1
1
1
1
0
D1
D2
D3
D4
D5
D6
SMBCLK
SMBDATA
Start
by
Ack
by
No Ack
by
Stop
Cond
by
SMBDATA
Master
Address Byte
G760
Pointer Byte
G760
9
1
9
1
0
0
0
0
0
0
R/W
0
1
1
1
1
1
0
SMBCLK
D0
D1
Master
Address Byte
G760
Data Byte
Master
Master
1
9
1
9
R/W
0
1
1
1
1
1
0
D0
D1
D2
D3
D4
D5
D6
D7
Start
by
Ack
by
Ack
by
by
by
by
by
Repeat
Start
Ack
No Ack
Stop
Cond
Master
Address Byte
G760
Pointer Byte
G760
Master
Master
Address Byte
9
1
9
1
9
1
9
D0
D7
0
0
0
0
0
0
Data Byte
G760
SMBCLK
SMBDATA
R/W
0
1
1
1
1
1
0
0
1
1
1
1
1
0
D1
D2
D3
D4
D5
D6
R/W
D0
D1
Start
by
Ack
by
Ack
by
No Ack
by
Stop
Cond
by
Ack
by
9
1
9
1
9
1
Master
Address Byte
R/W
G760
Pointer Byte
Master
G760
Master
Configuration Byte
0
0
0
0
0
0
0
1
1
1
1
1
0
D0
D7
D0
D1
D2
D3
D4
D5
D6
D1
SMBCLK
SMBDATA
Start
by
Ack
by
Ack
by
Ack
by
Stop
Cond
by
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
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