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參數(shù)資料
| 型號： | LC898023 |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP208 |
| 封裝： | SQFP-208 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大小： | 68K |
| 代理商： | LC898023 |
RAS0, RAS1, RAS2 (output)
Buffer DRAM RAS outputs. Normally, RAS0 is used. However, if two 16-Mbit DRAMs are used, connect the RAS0
and RAS1 lines to the RAS pins on the DRAMs. If four 16-Mbit DRAMs are used, connect the RAS0, RAS1, RAS2,
and LWE lines to the RAS pins on the DRAMs.
CAS0, CAS1 (output)
Buffer DRAM CAS outputs. Normally, CAS0 is used. However, if two 16-Mbit DRAMs are used, connect the CAS0
output to the CAS pins on the DRAMs. If 2-CAS type DRAMs are used, connect CAS0 to UCAS and CAS1 to
LCAS.
OE (output)
Buffer RAM read output.
UWE, LWE (output)
Buffer RAM write outputs. Connect these to the corresponding pins. If 2-CAS type DRAMs are used, UWE must be
connected. (Leave LWE open.)
1. Analog Interface Pins
RREC (input)
Optical discrimination input.
FE (input)
Focus error signal input.
TE (input)
Tracking error signal input.
VREF (input)
Input for the servo system reference voltage.
AD0, AD1, AD2 (input)
A/D converter auxiliary inputs.
DA0, DA1, DA2 (input)
D/A converter auxiliary inputs.
TES (input)
TES comparator input.
TDO (output)
Tracking control signal output.
FDO (output)
Focus control signal output.
SLDO (output)
Sled control signal output.
SPDO (output)
Spindle control signal output.
2. EFM Input Block Pins
EFMIN (input)
EFM signal input.
The high-frequency components of the RF signal acquired from the RF amplifier are cut with a capacitor, and this
pin inputs that signal biased by the value of the SLCO0 to SLCO3 outputs passed through a low-pass filter.
EFMIN2 (input)
Used to change the time constant of the low-pass filter.
SLCIST1, SLCIST2 (input)
Slice level controller charge pump bias resistor connection.
SLCO0, SLCO1, SLCO2, SLCO3 (output)
Slice level controller charge pump outputs.
These levels bias the RF signal input to the EFMIN pin after being passed through a low-pass filter.
DSLB (output)
Slice level control PWM output.
EFMO (output)
Post-binarization EFM signal output. (For monitoring)
No. 6494-10/12
LC898023
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