FCM8201 Fairchild Semiconductor, FCM8201 Datasheet - Page 19

• Manufacturer Part Number: FCM8201
• Description: FCM8201 is a three-phase sinusoidal brushless DC (BLDC) motor controller
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FCM8201 • Rev. 1.0.2
AS_REG: AS Pin Voltage Level Read Register
VSENSE_REG: VSENSE Pin Voltage Level Read Register
I_FB_REG: I_FB Pin Voltage Level Read Register
RT_REG: RT Pin Voltage Level Read Register
HPERH_REG: Hall Period Counter HIGH Byte
HPERL_REG: Hall Period Counter LOW Byte
STATUS_REG: System Status Register
Table 7. SPI Registers Table (Read Only)
Addr.
Addr.
Addr.
Addr.
Addr.
Addr.
Addr.
0x20
0x21 VSENSE
0x22
0x23
0x26
0x27
0x28 STATUS
b[4:0]
b[4:0]
b[4:0]
b[4:0]
b[7:0]
b[7:0]
b7
b6
b5
b4
b3
b2
b1
b0
HPERH
HPERL
Name
Name
Name
Name
Name
Name
Name
I_FB
AS
RT
HP[15:8] Hall period count HIGH byte, bit [15:8]
IFB[4:0] I_FB voltage=( IFB[4:0] × 0.125 ) ＋ 0.5V
SHORT 1=Short-circuit current protection triggered
HP[7:0]
H_ERR
AS[4:0]
VS[4:0]
RT[4:0]
Type
Type
Type
Type
Type
Type
Type
WDT
DIR
OC
OS
OV
OT
R
R
R
R
R
R
R
AS voltage=( AS[4:0] × 0.125 ) ＋ 0.5V
VSENSE voltage=( VS[4:0] × 0.125 ) ＋ 0.5V
RT voltage=( RT[4:0] × 0.125 ) ＋ 0.5V
Hall period count LOW byte, bit [7:0]
1=Over-temperature protection triggered (RT pin voltage ＜ V
1=Overload current protection triggered
1=Open/Short protection triggered
1=Motor drive over-voltage protection triggered (VSENSE pin voltage ＞ V
1=Hall signals error (HA/B/C=1/1/1 or 0/0/0)
1=Hall direction different from that on the PWM sequencer table
1=Watch dog time-out triggered
HP15
HP7
n/a
n/a
n/a
n/a
B7
B7
B7
B7
B7
B7
B7
OT
HP14
HP6
OC
n/a
n/a
n/a
n/a
B6
B6
B6
B6
B6
B6
B6
HP13
HP5
n/a
n/a
n/a
n/a
OS
B5
B5
B5
B5
B5
B5
B5
19
HP12
IFB4
HP4
AS4
VS4
RT4
OV
B4
B4
B4
B4
B4
B4
B4
H_ERR
HP11
IFB3
AS3
VS3
RT3
HP3
B3
B3
B3
B3
B3
B3
B3
HP10
IFB2
AS2
VS2
RT2
HP2
DIR
B2
B2
B2
B2
B2
B2
B2
RT
)
WDT
IFB1
HP9
HP1
AS1
VS1
RT1
B1
B1
B1
B1
B1
B1
B1
OV_MOTOR
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SHORT
IFB0
HP8
HP0
AS0
VS0
RT0
B0
B0
B0
B0
B0
B0
B0
)