參數(shù)資料
型號(hào): SAA7348GP
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: All Compact Disc Engine ACE
中文描述: 8-BIT, MROM, 35 MHz, MICROCONTROLLER, PQFP100
文件頁數(shù): 12/60頁
文件大小: 205K
代理商: SAA7348GP
1997 Jul 11
12
Philips Semiconductors
Preliminary specification
All Compact Disc Engine (ACE)
SAA7348GP
Motor control; the spindle motor is controlled by a fully
integrated digital servo. Address information from the
internal 8 frame FIFO and disc speed information are
used to calculate the motor control output signals.
Several output modes are supported:
– Pulse density, 2-line (true complement output),
1
×
n MHz sample frequency
– PWM-output, 2-line, 22.05
×
n kHz modulation
frequency
– CDV motor mode
– Brushless motor control mode.
A simplified illustration of the data flow through the
decoder is shown in Fig.4.
Table 2
Decoder playback speeds; note 1
Notes
1.
2.
3.
4.
X = don’t care.
With an 8.4672 MHz crystal, and only if SELPLL = 1 (i.e. clock multiplier enabled; see also Section 8.1.1).
Can use external 33.8688 MHz crystal.
Can use external 16.9344 MHz crystal.
REGISTER B
REGISTER E
INTERNAL FREQUENCY (MHz)
67.7376
(2)
50.8032
(2)
33.8688
(2)(3)
16.9344
(4)
n = 2
n = 1
n = 4
n = 2
00XX
00XX
01XX
01XX
10XX
10XX
11XX
0XXX
1XXX
0XXX
1XXX
0XXX
1XXX
0XXX
n = 2
n = 8
n = 4
n = 16
n = 1.5
n = 6
n = 3
n = 12
n = 1
n = 4
n = 2
n = 8
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