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参数资料
| 型号： | TC655EUNTR |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, PDSO10 |
| 封装： | PLASTIC, MSOP-10 |
| 文件页数： | 11/36页 |
| 文件大小： | 706K |
| 代理商： | TC655EUNTR |
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2002 Microchip Technology Inc.
DS21734A-page 19
TC654/TC655
6.3
CONFIGURATION REGISTER
(CONFIG)
The Configuration Register is an 8-bit read/writable
multi-function control register. This register allows the
user to clear fan faults, select RPM resolution, select
VOUT duty cycle (fan speed) control method, select the
fan current pulses per rotation for fans 1 & 2 (for fan
RPM calculation) and put the TC654/TC655 device into
a shutdown mode to save power consumption. See
Register 6-3 below for the Configuration Register bit
descriptions.
REGISTER 6-3:
CONFIGURATION REGISTER (CONFIG)
R/W-0
R/W-1
R/W-0
R/W-1
R/W-0
FFCLR
RES
DUTYC
F2PPR
F1PPR
SDM
bit 7
bit 0
bit 7
FFCLR: Fan Fault Clear
1
= Clear Fan Fault. This will reset the Fan Fault bits in the Status Register and the FAULT
output.
0
= Normal Operation (default)
bit 6
RES: Resolution Selection for RPM Output Registers
1
= RPM Output Registers (RPM1 & RPM2) will be set for 25 RPM (9-bit) resolution.
0
= RPM Output Registers (RPM1 & RPM2) will be set for 50 RPM (8-bit) resolution. (default)
bit 5
DUTYC: Duty-Cycle Control Method
1
= The VOUT duty-cycle will be controlled via the SMBus interface. The value for the VOUT
duty-cycle will be taken from the duty-cycle register (DUTY_CYCLE).
0
= The VOUT duty-cycle will be controlled via the VIN analog input pin. The VOUT duty-cycle
value will be between 30% and 100% for VIN values between 1.62 V and 2.6 V typical. If
the VIN pin is open when this mode is selected, the VOUT duty-cycle will default to 39.33%.
(default)
bit 4-3
F2PPR: Fan 2 Pulses Per Rotation
The TC654/TC655 device uses this setting to understand how many current pulses per revolu-
tion Fan 2 should have. It then uses this as part of the calculation for the fan 2 RPM value in
the RPM2 Register. See Section 7.7 for application information on determining your fan’s
number of current pulses per revolution.
00
=1
01
= 2 (default)
10
=4
11
=8
bit 2-1
F1PPR: Fan 1 Pulses Per Rotation
The TC654/TC655 device uses this setting to understand how many current pulses per revolu-
tion Fan 1 should have. It then uses this as part of the calculation for the fan 1 RPM value for
the RPM1 Register. See Section 7.7 for application information on determining your fan’s
number of current pulses per revolution.
00
=1
01
= 2 (default)
10
=4
11
=8
bit 0
SDM: Shutdown Mode
1
= Shutdown Mode. See Section 4.9 for more information on low power shutdown mode.
0
= Normal Operation. (default)
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
’1’ = Bit is set
’0’ = Bit is cleared
x = Bit is unknown
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