HD49235 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD49235

Digital Signal Processor for CD

Hitachi -> Renesas Electronics 

HD49235FS

Pin Description (cont)

Pin

Polarity

No. Symbol Name

I/O* Connection Function

H

L

71 TEST3 TEST 3

IU

72 UCKSL Microcomputer IU

clock selection

Open or VDD

Test pin

Microprocessor clock

switching signal input

16.9344 8.4672

MHz MHz

73 VDD (D) VDD (digital)

—

74 PWM Pulse width TO

modulate

Digital power supply

Constant linear velocity (CLV)

control signal for disc motor

75 MON Motor on

O

Disc-motor-on status detection On

output

76 MSTOP Motor stop TO

CLV phase control signal

77 PW64 Pulse width O

64T

Microprocessor Brake release signal

78 ROTD Rotate

direction

O Microprocessor MSB of PWM pin output, for

monitoring

79 CLVS CLV status O Microprocessor Output indicating normal or Normal Starting

starting mode of CLV control

80 SLOCK Sync lock

O Microprocessor Disc motor rotation lock signal Lock

Note: * I—input; O—output; IO—input/output; IU—pulled-up input; TO—three-state output; A—analog pin;

AI—analog input; AO—analog output; XI—oscillator input; XO—oscillator output

Rev.2, Aug. 1995, page 6 of 41

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