Philco PH-919 Service Manual page 14

PIN Symbol
173 YUV6
174 ICE
175 FS1
176 VSYN
177 YUV7
178 DVSS
179 HSYN
182 DVDD2
185 DVDD3
186 XTALO
187 XTALI
188 PRST
189 DVSS
195 SDATA
196 SDEN
197 SLCK
198 BDO
199 ADCVSS
200 ADIN
202 TEZISLV
203 TEI
204 CSO
205 FEI
206 RFLEVEL
207 RFRP_DC
208 RFRP_AC
209 HRFZC
210 PWMVREF
211 PWM2VREF
212 ADCVDD3
215 RFIN
216 RFIP
MT1336
GENERAL DESCRIPTION
MT1336 is a high performance CMOS analog front-end IC for both CD_ROM driver up to 48xs and DVD-ROM driver up
to 16xs. It also supports DVD-RAM read up to 4xs Version 2. It contains servo amplifiers to generate focusing error,
3-beam tracking error, 1 beam radial push-pull signal, RF level and SBAD for servo functions. It also includes DPD
tracking error signal for DVD_ROM application. For DVD-RAM disks, there are also Differential Push-Pull (DPP) method
for generating tracking signal and Differential Astigmatic Detection (DAD) for processing focusing signal. Programmable
equalizer and AGC circuits are also incorporated in this chip to optimize read channel performance. In addition, this chip
has dual automatic laser power control circuits for DVD-ROM (DVD-RAM) and CD-ROM seperately and reference
voltage generators to reduce external components. Programmable functions are implemented by the access of internal
register through bi-directional serial port to configure modes selection.
FEATURES
. RF equalizer with programmable f
. MT1336 supports at least eight different kinds of pick-up heads with versatile input configuration for both RF input stages
and servo signal blocks.
. Versatile on-line AGC.
. 3 beams tracking error signal generator for CD_ROM application.
. One beam differential phase tracking error (DPD) generator for DVD_ROM application.
. Differential push pull tracking error (DPP) generator for DVD_RAM application.
12
Type
Output Video data output bit 6
Input,pull down Microcontroller ICE mode enable
output
Inout Vertical sync / GPIO16
Output Video data output bit 7
Ground Ground
Inout Horizontal sync / GPIO15
Power 2.5V power
Power 3.3 power
Output Crystal output
Input Crystal input,27MHz
Input,pull down Power on reset input, active high
Ground Ground
Output RF serial data input
Output RF serial data latch enable
Output RF serial clock output
Input,pull down Flag of defect data status input
Ground Ground
Analog input General A/D input
Analog input Tracking error zero crossing low pass input
Analog input Tracking error input
Analog input Central servo input
Analog input Focus error input
Analog input Sub beam add input or RFRP low pass input
Analog input RF ripple detect input
Analog input RF ripple detect input (through AC coupling)
Analog input High frequency RF ripple zero crossing
Analog input A reference voltage input for PWM circuitry.A typical value of 2.8v
Analog input A reference voltage input for PWM circuitry.A typical value of 1.4v
Power 3.3V power
Analog input Negative input of RF differential signal
Analog input Positive input of RF differential signal
from 3MHz to 70MHz and programmable boost from 3db to 13db.
c
Description