參數(shù)資料
型號: SAA7335GP
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: DSP for CD and DVD-ROM systems
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-407-1, LQFP-100
文件頁數(shù): 19/36頁
文件大小: 196K
代理商: SAA7335GP
1997 Aug 11
19
Philips Semiconductors
Preliminary specification
DSP for CD and DVD-ROM systems
SAA7335
O
PERATIONAL MODES
The motor servo has a number of operational modes controlled by the motor mode register MOTOR4.
P
OWER LIMIT
To start and stop the spindle motor, a fixed positive or negative voltage is applied to the motor. This voltage can be
programmed as a percentage of the maximum possible voltage via the motor output configuration register (MOTOR4) to
limit current drain during start and stop. The following power limits are possible:
100% of maximum (no power limit)
75% of maximum
50% of maximum
37% of maximum.
L
OOP CHARACTERISTICS
The gain and crossover frequencies of the motor control loop can be programmed via the motor gain and bandwidth
register MOTOR2.
MGA363 - 1
MOTO2
VDD
VSS
MOTO1
M
22 k
10 nF
+
22 k
10 nF
+
VSS
VSS
MOTO1
M
22 k
10 nF
+
22 k
22 k
VSS
VDD
VSS
22 k
22 k
Fig.13 Motor pulse density application diagrams.
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