参数资料
型号: LC78631E
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封装: QFP-80
文件页数: 16/34页
文件大小: 502K
代理商: LC78631E
No. 5342-23/34
LC78631E
PWM output format
PWM output example
19. CD-ROM outputs; Pin 42: LRSY, pin 43: CK2, pin 44: ROMXA, pin 45: C2F
Although the LC78631E is initially set up to output audio data MSB first from the ROMXA pin in synchronization
with CK2, it can be switched to output CD-ROM data by issuing a CD-ROM XA command. Since this data has not
been processed by the interpolation, previous value hold, muting, and other digital circuits, it is appropriate for input
to a CD-ROM decoder LSI. CK2 is a 2.1168 MHz clock, and data is output on the CK2 falling edge. However, this
clock polarity can be inverted by issuing a CK2 polarity inversion command. C2F is the flag information for the data
in 8-bit units. Note that the CD-ROM XA reset command has the same function as the CONT1 pin (pin 37).
Code
Command
RES = low
$88
CD ROM XA
$8B
CONT AND CD-ROM XA RESET
q
$C9
CK2 POLARITY INVERSION
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