tc94a23f TOSHIBA Semiconductor CORPORATION, tc94a23f Datasheet - Page 2

• Manufacturer Part Number: tc94a23f
• Description: Single-chip Cd Processor With Built-in Controller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

4-bit Microcontroller
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CD Processor
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Note:
I/O port: CMOS I/O port: 16
Timer/counter: 8 bit (INTR, instruction cycle, 100/1 kHz selectable as timer clock)
Buzzer: Four types: 0.75, 1, 1.5, and 3 kHz
Back-up mode: three types
Reliable sync pattern detection, sync signal protection and interpolation
Built-in EFM decoder and sub code decoder
High-correction capability using cross interleave read Solomon code (CIRC) logical equation
Supports variable speeds.
Jitter absorption capability of ±6 frames
Built-in 16 KB RAM
Built-in digital output circuit
Built-in L/R independent digital attenuators
Bilingual audio output (Note)
Sub code Q data are read-timing free and can be output in sync with audio data. (Note)
Built-in data slice and analog PLL (adjustment-free VCO used) circuit
Auto adjustment of loop gain, offset, and balance at focus servo and tracking servo
RF gain auto adjustment circuit
Built-in digital equalizer for phase compensation
Supports different pickups using built-in digital equalizer coefficient RAM.
Built-in focus and tracking servo control circuit
Search control supports all modes and realizes high-speed, stable search.
Lens kick and feed kick use speed control method.
Built-in AFC circuit and APC circuit for disc motor CLV servo.
Built-in defect/shock detector
Built-in 8 times oversampling digital filter and 1-bit DA converter.
Program memory (ROM): 16-bit ´ 8k-step
Data memory (RAM): 4-bit ´ 512-word
Instruction execution time: 1.89/1.78/40 ms (all one-word instructions)
Crystal oscillator frequency: 16.9344 MHz/4.5 MHz/75 kHz
Stack level: 8
AD converter: 6-bit ´ 4-channel
LCD driver: 1/4 duty, 1/2 or 1/3 bias method, 72 segments max
LED driver: 4-digit ´ 14-segment (max), also used as LCD driver switched by software
Serial interface: Supports 2/3-line method (data length: 4 or 8 bits)
Interrupt: 1 external, 3 internal (CD sub-sync, serial interface, 8-bit timer)
Reset function: Power-on reset, built-in supply voltage detector (detection voltage = 2.5 V typ.)
C1 correction: dual
C2 correction: quadruple
Output pins for sub code Q data and audio data are also used as LCD driver pins. The function of the pins
can be switched by program.
Four modes: Continuous, Single-Shot, 10 Hz Intermittent, and 10 Hz Intermittent at 1 Hz Interval)
N-channel open drain I/O port: 4 (max)
Output-only port: 4 (max), also used as CD processor pins
Input-only port: 4
10, 100, or 500 Hz: internal port
2 Hz: Flip-flop port
Clock Stop (crystal oscillator off)
Hardware Wait (crystal oscillator on but CPU in operation)
Software Wait (CPU in intermittent operation)
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TC94A23F
2002-02-06