參數(shù)資料
型號: SAA7392HL
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: Channel encoder/decoder CDR60
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: 12 X 12 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-315-1, LQFP-80
文件頁數(shù): 39/76頁
文件大?。?/td> 246K
代理商: SAA7392HL
2000 Mar 21
39
Philips Semiconductors
Preliminary specification
Channel encoder/decoder CDR60
SAA7392
7.10
Motor control
The spindle motor is controlled by a fully integrated digital servo sub-system within the SAA7392. Information from the
data FIFO, data recovery PLL and tacho inputs may be used to calculate the motor control output signals.
The frequency set-point, the FIFO settings and coefficients G, K
i
and K
f
are all programmable using the seven motor
control registers. The motor can be controlled in either Pulse Width Mode (PWM) or Pulse Density Mode (PDM).
The tacho control subsystem allows a range of different motor tacho systems to be used, the modes and prescalers are
programmable via the tacho register set. (Note due to pin multiplexing, PWM motor control mode and CAV mode using
tacho control are mutually exclusive).
Fig.17 Motor servo block diagram.
handbook, full pagewidth
MGR807
Wobble frequency
24T
PLL frequency
FIFO filling
FIFO half-full
set-point
XError
Ktacho
1/(2.667
×
system clock)
tacho
set-point
reset
SW1
SW2
overflow
detector
motor
pads
motor
analog output
stage gain
+
frequency/tacho
set-point
tacho
interrupt
tacho
frequency
TACHO
LOW-PASS
FILTER
PDM/PWM
MODULATOR
COMPARE
TRANSITION
DETECTOR
T2
Ki
MOTO2/T3
M
+
+
+
G
EXTERNAL
MOTOR CIRCUIT
Kf
+
GE
+
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