LG CRD-8480M User manual

3
INTRODUCTION
GENERAL FEATURE
SPECIFICATIONS
1. SUPPORTED SYSTEM
• IBM Compatible 486SX or Above (With PIO mode 4 recommended)
2. SUPPORTED OS
3. GENERAL PERFORMANCE
• Data Transfer Rate..........................................................................................Sustained Data Transfer Rate
20Times Speed (Inner side) : 3,000 kbytes/sec
48 Times Speed (max., Outer side) : 7,200 kbytes/sec
• Data Buffer Capacity .....................................................................................................................128 kbytes
• Access Time ...................................................................................................Random Access Time : 75 ms
4. POWER REQUIREMENTS
• Voltage.......................................................................................................................................+5V DC +5%
+12V DC +5%
• Ripple...................................................................................................................+5V : Less than 100mVp-p
+12V : Less than 100mVp-p
• Current........................................................................................................................+5V : 0.9A (Maximum)
+12V : 1.5A (Maximum)
5. AUDIO PERFORMANCE
• Frequency Response .....................................................................................................20Hz~20KHz(+3dB)
• S/N Ratio (IHF-A+20 KHz LPF)........................................................................85 dB (Typical at 1 KHz 0dB)
80 dB (Limit at 1 KHz 0dB)
• T.H.D. (IHF-A+20 KHz LPF) ............................................................................0.05% (Typical at 1 KHz 0dB)
0.15% (Limit at 1 KHz 0dB)
• Channel Separation (IHF-A+20 KHz LPF)..............................................................................80 dB (Typical)
70 dB (Limit)
• Output Voltage (1kHz 0dB) 47KΩLoad .................................................................................0.7Vrms +10%
• Headphone Level (1kHz 0dB) 33ΩLoad ...............................................................................0.7Vrms +20%
• Enhanced IDE interface
• Internal 5.25 inch, halfheight CD-ROM Drive
• Fast 75ms Average Access Time
• Max 7,200KB/sec Sustained Transfer rate
• Photo-CD Multisession Disc Spec compliant
• Multimedia MPC-3 Spec compliant
• Power Tray Loading/Ejection Mechanism
• 3 Way Eject support (Software, O/C Button,
Emergency Eject)
• Closed Enclosure
• Built-in ATAPI Interface Controller
• Software Volume Control
• 8 Times Digital Filter for CD Audio
• Front panel Volume Control for Headphone Output
• Built-in MODE-1 ECC/EDC
• MTBF 125,000h POH (at 10% Utilization)
• PIO Mode 4 & Multi DMA Mode 2 support
• Horizontal or Vertical Mounting
• Digital audio output connector
• Digital audio through ATAPI Interface
• Subcode (P-W) through ATAPI Interface
• Spin-down Mode for energy saving
• MS-DOS Version 3.1 or Higher
• OS/2 Warp (Ver 3.0)
• Windows '95/'98
• Solaris Ver 2.4 or Higher
• Linux slackware Ver 2.3
• Windows NT 4.0 or later
This service manual provides a variety of service
information. It contains the mechanical structure of
the CD-ROM Drive together with mechanical
adjustments and the electronic circuits in schematic
form. This CD-ROM Drive was manufactured and
assembled under our strict quality control standards
and meets or exceeds industry specifications and
standards.

4
LOCATION OF CUSTOMER CONTROLS
(1) Headphone Jack
3.5mm jack for monitoring the audio signal from audio
CDs.
(2) Headphone Volume Control
Adjusts the headphone sound level.
(3) Disc Drawer
Accepts a CD-ROM disc on its tray.
(4) Busy Indicator
The Busy Indicator lights during initialization and data-
read operations.
(5) Emergency Eject Hole
Insert a paper clip here to eject the drawer manually or
when there is no power.
(6) Play/Skip Button
When an Audio CD is in the Disc Drawer, pressing
this button will start playing audio CDs from the first
track. If an audio CD is playing, pressing this button
will skip to the next track.
(7) Open/Close/Stop Button
This button is pressed to open or close the CD tray.
If an audio CD is playing, pressing this button will stop
it, and pressing it again will open the tray.
COMPACT
1254 6 73
Figure 1. Front View
(1) Digital Audio Output Connector
This is a digital audio output connector or Video CD
output connector.
You can connect this to the digital audio system or
Video CD Board.
(2) Analog Audio Output Connector
The Audio Output Connector connects to a sound
card.
The supplied audio cable is a SoundBlaster®type
cable. If you have a different sound card, you will
need to contact the sound card manufacturer to obtain
the proper cable for that card.
(3) Master / Slave / CSEL Jumper
These three jumpers are used to set the CD-ROM
Drive to either a Master, Slave, or CSEL drive.
(4) Interface Connector
This 40-pin connector is used to transfer and control
signals between the CD-ROM Drive and your PC.
Connect the 40-pin IDE cable in your PC to this
connector.
(5) Power-in Connector
Attach a power cable from the computer to this
connector.
Figure 2. Back View
DIGITAL ANALOG
INTERFACE POWER
DR CSM
SLA
GLG39 1+5 +12
GND
40 2
AUDIO AUDIO
125
4
3
FRONT
REAR
Figure 2. Back View

2. Trouble List (Circuit)
A. LED doesn’t light.
B. Pick-Up doesn’t move to the inner-track.
C. The Laser of Pick-Up doesn’t light.
D. Pick-Up lens doesn’t move up and down.
E. Disc doesn’t rotate.
F. TOC isn’t read. (The LED turns on, but doesn’t flicker.)
G. During Audio CD Play, LED flickers, but Speaker is silent.
20
TROUBLESHOOTING GUIDE
1. Initial Lead-in Operation
Reset or Power-On.
LED Flickers.
Pick-Up moves to the inner-Track.
Laser on the Pick-Up lights.
Focus Search (through moving up and down the lens of Pick-Up)
Focus Servo On (FEO(IC501 Pin 12 ) signal generation)
Rotate disc.
Tracking Servo On (TEO (IC501 Pin 15 ) Signal generation)
Spindle Servo On (DMSO(TP25) Signal generation)
Read TOC Area (LED Flickers)
Search the Start of Data Area and then pause.

21
3. Troubleshooting Guide
A. LED doesn’t light.
Check Power Voltage (TP1:3.3V, TP2:12V)
Reference Voltage
[TP5:V13(1.3V) and GND.]
Does “H” output in IC501 pin ?
Check and replace R705, R706, Q701
and LED701 (LED703 for DELL).
Is the CLOCK Frequency of
IC501 pin 33.86MHz?
Check the power input
pattern.
Check IC501.
Check and replace
X501; 33.86MHz.
Is the CLOCK Frequency of IC501 pin
33.86MHz?
Check and replace IC501.
YES
OK
NG
YES
YES
NO NO
NO
37 54
54
A-1
A-1

22
B. Pick-Up doesn’t move to the inner track.
Do the signals appear at IC501
pin , ?
(Refer to Fig. B-1.)
Do the signals appear in PN301
pin?
(Refer to Fig. B-2.)
Does “H” output at IC201
pin ?
Is the 1.3V at IC201 pin ?
Check the pattern from
IC501 pin to IC201
pin
.
Check IC501.
Check IC501.
Check the PN301, and then
replace the Sled Motor.
YES
YES
YES
YES
NO
NO
Replace IC201.
NO
NO
173
41
25
174
165
41
CH1
PIN174
FMO
CH2
PIN173
FMO2
CH1 TP4
CH2 TP5
CH3 TP6
CH4 TP7
Fig. B-1. FMO and FMO2 Signals Fig. B-2. TP4, TP5, TP6 and TP7 Signals

Check the pattern from
IC501 pin to R225
and then replace IC501.
23
Is the voltage of IC501 pin
(LD0) 1V?
Check Pick-Up FFC, PN101.
Check Q101, C101, C102
and then replace IC101.
YES
NO
10
181
Does the focus search signal
appear at F0S0 (TP9)?
(Refer to Fig. D-1.)
Is the 1.3V at IC201 pin ?
Check IC501.
YES
YES
YES
NO
NO
Replace IC201.
NO
25
Does the focus search signal
appear between F+ (TP10)
and F- (TP11)?
(Refer to Fig. D-2.)
C. The Laser of Pick-Up doesn’t light.
D. The Pick-UP lens doesn’t move up and down.
D-1

24
Check the pattern from
pin , of IC201 to
pin , of PN101.
Check the PN101, Pick-Up
FFC.
Replace the Pick-Up.
Replace PN101 or Pick-Up
FFC.
OK
OK
NG
34 35
14
CH1
TP9
(FAO)
CH1
TP10(F+)
TP11(F-)
Fig. D-1. F0S0 Signal Fig. D-2. Focus Search Signal
D-1

25
Does the signal appear at
the DMS0 (TP25)?
(Refer to Fig. E-3.)
Do the signals appear at
IC201 pin (W), (V),
and (U)?
Replace IC501.
Replace IC201.
YES
NO
NO
12
14
13
Check the pattern from
IC201 pin , , to
PN201 , , .
YES
OK
12 13 14
13 12 11
Check Spindle Motor FFC
and then replace the
Spindle Motor.
Does the signal appear at
FEO(IC501 pin ) when
the R126 opened?
(Refer to Fig. E-1.)
YES
YES YES
NO NO
Replace IC501.
Replace IC501.
Replace Pick-Up.
NO
Do the signal appear at
FEO (IC501 pin )?
(Refer to Fig. E-2.)
Does the signal appear at
F+(TP10) during focus
search?
E. Disc doesn’t rotate.
12
12

26
Fig. E-2. FEO Signal
CH1
TP15:
FEO
Fig. E-3. DMS0 Signal
CH1
TP25:
DMS0
Fig. E-1. S-Curve
CH1
TP15:
S-Curve

27
Is the Focus Servo ON?
(Does FEO(IC501 pin )
signal appear?)
Does A, B, C, D signal
appear at IC501 pin ,
?
YES YES
NO
3
12
4
NO
Is the Tracking Servo ON?
(Does TEI (IC501 Pin )
signal appear?)
Does E, F signal appear
at IC501 pin , ?
YES
NO
8
YES
Is TOC area on the disc
read? (Does LED flicker?)
Does the other disc
operate normally?
Normal Disc is defective.
YES YES
NO
9
NO
Does RFAC signal (IC501
Pin ) appear?
Is Spindle Servo ON?
(Does DMS0 signal
(TP25) appear?)
YES YES
NO
NO
NO
Does RFI signal appear
at IC501 pin ?
1
20
Replace IC101.
Replace IC501.
Replace IC501.
Replace Main Circuit
Board or MD Ass’y.
NO
Refer to C.
(The Laser of Pick-Up
doesn’t light.)
F. TOC isn’t read.
15

28
Does Audio signal appear
at IC501 pin , ?
(Refer to Fig. G-1.)
YES
NO
110 112
Replace IC501.
Does “H” signal appear at
IC501 pin ?
YES
NO
25
Check the IC501 pin
and then replace IC501?
108
Check C702.
YES
YES
YES
Are L-ch, R-ch signals
appear at JK701 and
Audio Line out connector
each?
NO Check JK701 and
L701,L703.
Does Audio signal appear
at IC701 pin , ?
NO
1 7
Is the voltage of IC701
pin ?
6
NO Replace IC701.
G. During Audio CD play, LED flickers, but Speaker is silent.
G-1

29
Is the connection
between JK801 (or Audio
Line out connector) and
Line (or Jack) normal?
NO Check the JK801 and
Audio line pattern.
YES
Check your sound card,
Audio Cable, Speaker,
Volume and Headphone
Jack.
Fig. G-1. Audio Signal
CH2
PIN3 of
IC601
CH2
PIN12 of
IC601
G-1

1. CABINET and CIRCUIT BOARD
DISASSEMBLY
1-1. Bottom Chassis
A. Release 4 screws (A) and remove the Bottom
Chassis in the direction of arrow (1). (See Fig. 1-1)
1-2. Front Bezel Assy
A. Insert and Press a rod in the Emergency Eject
Hole and then the CD Tray will open in the
direction of arrow (2).
B. Remove the Tray Door in the direction of arrow (3)
by pushing it outward.
C. Release 3 stoppers and remove the Front Bezel
Assy.
1-3. Cabinet and Main Circuit Board
A. Remove the Cabinet in the direction of arrow (4).
(See Fig. 1-3)
B. Release 2 hooks (a) and remove the CD Tray.
C. Remove the Soldering of the LD- and LD+ (B) for
the Loading Motor, and then remove the Main
Circuit Board.
D. At this time, be careful not to damage the 3
connectors of the Main Circuit Board.
2. MECHANISM ASSY
A. Separate the Pick-Up Unit from the Mechanism
Assy.
B. Release 1 screws (C) and then remove the Pick-
Up ( ).
DISASSEMBLY
(A)
(A)
(A)
(A)
(1)
Bottom Chassis
(3)
(2)
Tray Door
Stoppers
CD Tray
Emergency Eject Hole Front Bezel Assy
(4)
Hooks (a)
Cabinet
Main
Circuit Board
(B)
Mechanism Assy
(C)
Pick-up Unit
Fig. 1-1
Fig. 1-2
Fig. 1-3
Fig. 1-4
5

10
PHOTO DIODE STRUCTURE OF THE PICK-UP
(1) Focus Error Signal –> (A+C)-(B+D)
(Control the Pick-up’s up and down to focus on the Disc)
(2) Tracking Error Signal –> (E-F)
(Control the Pick-up’s left and right shift to find the track on the Disc)
(3) RF Signal –> (A+B+C+D)
( RF Signal is converted to Data Signal in One Chip IC (IC501))
Three signals (Focus Error Signal, Tracking Error Signal and RF Signal) above are I-V converted and
amplified at the IC501 and generated the Servo Control Signal and Data Signal.
Red laser
Pick-Up module
Tracking
Focusing
B
C
EF
D
A

11
IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION
•IC201 (M63022FP) : Drive IC (Spindle/Servo Actuator)
Rotates the Spindle Motor by receiving MDP signal from IC501.
Generates the signal to drive Focus Actuator Coil, Tracking Actuator Coil, Sled Motor, and Stepping
Motor by Control Signal input from DSP and u-COM.
Block Diagram
x12 x8
x12
FG
HU+
HU-
HV+
HV-
HW+
HW-
HB
SPIN
REF
SL1IN
SL2IN
FOIN
TOIN
5Vcc
TO+
TO-
FO+
FO-
GND
LO+
LO-
VM3
LOIN+
BRS
OSC
MU1
S
SS
S
VM1 RSP U V
W
RSL1 RSL2 SL1+ SL1- SL2+ SL2- VM2
FG Reverse
Detect
120ß
MATRIX
Hall Bias
CTL
amp
Direction
comp
Direction
comp Direction
comp
Current
comp
Current
comp Current
comp
CTL
amp CTL
amp
Logic Logic
TSD
BIAS
Frequency
generator
VM1
Regulator
Reg
Pin Description
Pin No. Symbol Description Pin No. Symbol Description
1 SL1IN Slide control voltage input 1
2 SL2IN Slide control voltage input 2
3 VM2 Motor Power Supply 3 (for Slide)
4 RSL2 Slide current sense 2
5 SL2+ Slide non-inverted output 2
6 SL2- Slide inverted output 2
7 GND GND
8 RSL1 Slide current sense 1
9 SL1+ Slide non-inverted output 1
10 SL1- Slide inverted output 1
11 GND GND
12 W Motor drive output W
13 V Motor drive output V
14 U Motor drive output U
15 RSP Spindle current sensie
16 HW- HW- sensor amp. input
17 HW+ HW+ sensor amp. input
18 HV- HV- sensor amp. input
19 HV+ HV+ sensor amp. input
20 HU- HU- sensor amp. input
21 HU+ HU+ sensor amp. input
22 VM1 Motor Power Supply 1 (for Spindle)
23 HB Bias for Hall Sensor
24 FG Frequency generator output
25 REF Refernce voltage input
26 SPIN Spindle control voltage input
27 FOIN Focus control voltage input
28 TOIN Tracking control voltage input
29 GND GND
30 5VCC 5V Power Supply (for FS, TS)
31 TO- Tracking inverted output
32 TO+ Tracking non-inverted output
33 GND GND
34 FO+ Focus non-inverted output
35 FO- Focus inverted output
36 LO+ Loading non-inverted output
37 LO- Loading inverted output
38 BRS Brake select control terminal
39 VM3 Motor power supply 3.(for Loading)
40 LOIN+ Loading control input( +)
41 MU1 Mute 1
42 OSC PWM carrier oscilation set

Servo
ADC Servo
DSP
PDM
&
PWM
DAC
Sync
Protection
CLV &
Zone-CLV
& True-
CAV
Control
Reset
Circuitry
IPLL
Decoder & uP
Clock Generator
Mega Interface
and GPIO Control
Host
Interface
Logic
CIRC Error
Correction
EFM & Q-
code
Demodulation
Varipitch
Clock
Generator
DAC &
LPF
Over-sampling
Digital Filter
Digital
Emphasis
Audio
Processing
Unit RSPC
Sync
Detector
Descrambler
RSPC
Decoding
Logic
Subcode
FIFO/
Parallelizer
Buffer Memory Controller
X'tal Clock
Generator
DSP Data
FIFO/
Parallelizer
8032
Micro processor
&
ICE Interface
Controller
&
Flash Controller
Mega
Interface
and
GPIO
Control
High Speed
Audio
Playback
Logic
Host
Data FIFO
ATAPI
Packet
FIFO
REF
APC
20
RFOP 156 IPLLVDD
155 DD7
154 DD8
153 DGND
152 DD6
151 DD9
150 DD5
149 DVDD
148 DD10
147 DD4
146 DD11
145 DD3
144 DGND
143 DD12
142 DD2
141 DD13
140 DD1
139 DD14
138 DGND
136
137 DD0
DD15
135
134
DMARQ
133
DIOW_
132
DIOR_
131
IORDY
130
DMACK_
129
INTRQ
128
IOCS16_
127
DVDD
126
DA1
125
PDIAG_
124
DVDD3
123
DA0
122
DA2
121
DGND
120
CS1FX_
119
CCS3FX_
118
DASP_
DEVSEL
117 ADGO/VIC
VPVSS
116
VCOCIN
115
VOVDD
114
DACVDD
113
112 LO
111 DACVREF
110 RO
109 DACVSS
108 RA3
107 RA4
106 RA2
105 RA5
208 RGND
207 MDI
10 LDO
2 SVDD
5 SGND
3 FNI
4 FPI
11 FEN
13 FEP
12 FEO
6 CSNI
7 CSPI
17 CSO
8 TPI
9 TNI
14 TEN
15 TEO
16 SBAD
18 TAVSS
21 TMA
22 TAVDD
23 TMB
24 IO1
25 IO2
26 IO3
37 LED
38 EJECT_
39 PLAY_
35 DVDD
36 TEST_EN
27 URD_/IO4
28 UP3_5/UT1
29 UP3_4/UT0
30 DGND
31 UNIT1_/IO5
32 UP3_2/UNIT0_
33 UP3_1/UTXD
34 UP3_0/URXD
40 ICEMODE
41 UWR_/IO6
42 UALE/08
43 UP1_0/UA16
44 UP2_7/UA15
45 UP2_5/UA14
46 UP2_5/UA13
47 UP2_4/UA12
48 UP2_3/UA11
49 UP2_1/UA9
50 UPSEN_/09
51 UP2_0/UA8
52
53
UP2_/UA10
DVDD3
19
RFON
1
RFI
206 205
OSN OSP
204
RVDD
203
V20
202
V13
201
V26
200
VOSN
199
VOSP
198
VOSNI
197
VOSPI
196
PLLVDD
195
IREF
194
PLLVSS
193
LPFN
192
LPFOP
191
LPFON
190
SPDON
189
SPDOP
188
PLLVDD
187
ADCVDD
186
RFRO
185
RFRPSLV
184
ADCVSS
183
TEZILP
182
PDMVDD
181
FOO
180
TRO
179
PDMVSS
178
DGND
177
TEBC
176
DVDD3
175
DMO
174
FMO
173
FMO2
172
HRFZC
171
DGND
170
ENDM
169
DVDD
168
FG
167
POR
166
RESET/O18
165
IO0
164
DVDD3
163
LIMIT_
162
TRCLOSE
161
TROPEN
160
TRAYOUT_
159
TRAYIN_
158
HRST_
157
IPLLVSS
54
XTALI
55
XTALO
56
DGND
57
FWR_
58
IO7/CS_
59
DVDD3
60
UP0_7/UAD7
61
UP0_6/UAD6
62
UP0_5/UAD5
63
UP0_4/UAD4
64
UP0_3/UAD3
65
UP0_2/UAD2
66
UP0_1/UAD1
67
UP0_0/UAD0
68
DGND
69
UXI/O19
70
UA0/O10
71
UA1/O11
72
UA2/O12
73
UA3/O13
74
UA4/O14
75
UA5/O15
76
UA6/O16
77
UA7/O17
78
RD15/VIO15
79
RD0
80
RD14/VIO14
81
RD1
82
RD13/VIO13
83
RD2
84
RD12/VIO12
85
RD3
86
RD11/VIO11
87
RD4
88
RD10/VIO10
89
RD5
90
RD9/VIO9
91
RD6
92
RD8/VIO8
93
RD7
94
CASL_/CAS_
95
CASH_/RWEH_
96
RWE_/RWEL_
97
RAS_
98
DVDD3
99
RA8
100
RA7
101
RA0
102
RA6
103
RA1
104
DGND
Focusing
Error
Centro_
Servo
Tracking
Error
RF Data PLL
and
Data Slicer
RFRP
12
•IC501 (MT1199E) : RF+DSP+ATAPI DECODER+µ-COM
Block Diagram

13
•IC501 MT1199E
Pin Description
Pin Numbers Symbol Type Description
RF Interface
208 RGND Ground Ground pin for RF and related analog circuitry.
204 RVDD Analog
Power(3.3V)
Power for RFand related analog circuitry.
1 RFI Analog Input RF signal input.
2 SVDD Analog
Power(3.3V)
Power for servo signal generator and related analog circuitry.
3 FNI Analog Input Main beam I-V amplifier (A+C) input.
4 FPI Analog Input Main beam I-V amplifier (B+D) input.
5 SGND Ground Ground pin for servo signal generator and related analog circuitry.
6 CSNI Analog Input Central Servo input 1
7 CSPI Analog Input Central Servo input 2.
8 TPI Analog Input Sub beam I -V amplifier F input.
9 TNI Analog Input Sub beam I-V amplifier E input.
11 FEN Analog Input Negative input of focusing error amplifier.
12 FEO Analog Output Focusing error output.
13 FEP Analog Input Positive input of focusing error amplifier.
14 TEN Analog Input Negative input of tracking error amplifier.
15 TEO Analog Output Tracking error output.
16 SBAD Analog Output Sub beam adder signal output.
17 CSO Analog Output Central Servo control output.
19 RFON Analog Output Negative RF output.
20 RFOP Analog Output Positive RF output.
206 OSN Analog Output RF offset loop integrating capacitor connecting
205 OSP Analog Output RF offset loop integrating capacitor connecting
APC Interface
10 LDO Analog Output Laser diode control output.
207 MDI Analog Input Voltage for monitoring the laser diode photo power.
21 TMA Analog Input Pin for laser power triming.
23 TMB Analog Input Pin for laser power triming.
18 TAVSS Ground Ground pin .
22 TAVDD Analog
Power(3.3V)
Power for trimming pads and related analog circuitry.
REF Interface
203 V20 Analog output 2.0 V reference voltage output
202 V13 Analog output 1.3 V reference voltage output
201 V26 Analog output 2.6 V reference voltage output

14
Data Slicer & Data PLL Interface
194 PLLVSS Ground Ground pin for data PLL and related analog circuitry.
189 SPDOP Analog Output Vco dac positive output.
190 SPDON Analog Output Vco dac negative output.
191 LPFON Analog Output The negative output of loop filter amplifier.
192 LPFOP Analog Output The positive output of loop filter amplifier.
193 LPFN Analog Input The negative input terminal of loop filter amplifier.
195 IREF Analog Input Current reference input. It generates reference current for data
PLL. Connect an external 15K resistor between this pin and
PLLVSS.
188,196 PLLVDD Analog
Power(3.3V)
Power for data PLL and related analog circuitry.
197 VOSPI Analog Input Positive input for analog slicer
198 VOSNI Analog Input Negative input for analog slicer
199 VOSP Analog Output Positive low pass filter output for analog slicer
200 VOSN Analog Output Negative low pass filter output for analog slicer
Turbo 8032 Interface
27 URD_/IO4 TTL Input
50K pull_up
Read signal input from ICE to MT1199, active low.
Alternate function : Programmable GPIO.
28 UP3_5/UT1 TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : T1. Timer 1 input.
29 UP3_4/UT0 TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : T0. Timer 0 input.
30 DGND Ground Ground pin for internal digital circuitry.
31 UINT1_/IO5 TTL Output Host interrupt output, connected to INT1_ pin of ICE, low active.
Alternate function : Programmable GPIO.
32 UP3_2
/ UINT0_
TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : INT0_. External interrupt 0, low active.
33 UP3_1
/ UTXD
TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : TXD. Serial transmit data.
34 UP3_0
/ URXD
TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : RXD. Serial receive data.
35 DVDD Power(5V) Power pin for internal digital circuitry.
40 ICEMODE TTL Input
50K pull_down
Internal or external P select. “1”indicates disable internal P and
external P is used.
41 UWR_/IO6 TTL I/O, Slew rate
SMT, 50K pull_up
WR_. Data write signal.
Alternate function : Programmable GPIO.
42 UALE
/ O8
TTL I/O
50K pull_up
Address latch enable output, active high.
Alternate function : Programmable output

15
43 UP1_0
/ UA16
TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : A16. Address bit 16 output.
Input 3.3V/5V tolerance, output 3.3V
44,45,46,47,
48,49,51,52
UP2_[7:0]
/ UA[15:8]
TTL I/O, Slew rate
50K pull_up
Programmable bi-directional I/O.
Alternate function : A[15:8]. Upper address bus input/output.
Input 3.3V/5V tolerance, output 3.3V
50 UPSEN_
/ O9
TTL I/O
50K pull_up
Programmable store enable output, active low. PSEN_ enables the
external ROM output port.
Alternate function : Programmable output.
Input 3.3V/5V tolerance, output 3.3V
53 DVDD3 Power(3.3V) 3.3V power pin for digital circuitry.
56 DGND Ground Ground pin for digital circuitry.
57 FWR_ TTL Output output 3.3V, flash write enable.
59 DVDD3 Power(3.3V) 3.3V power pin for digital circuitry.
60,61,62,63,
64,65,66,67
UP0_[7:0]
/ UAD[7:0]
TTL I/O, Slew rate Programmable bi-directional I/O.
Alternate function : AD[7:0]. Lower address/data bus output for
external device.
Input 3.3V/5V tolerance, output 3.3V
68 DGND Ground Ground pin for digital circuitry.
69 UXI/O19 TTL Output
Slew rate
P clock output for external system clock, connected to X1 of ICE.
output 3.3V
70,71,72,73,
74,75,76,77
UA[7:0]
/ O[17 :10]
TTL Oouput,
Slew rate
Lower address bus output for external device.
Alternate function : Programmable output.
output 3.3V
Xtal Interface
54 XTALI Input Xtal input. The working frequency is 33.8688 MHz.
55 XTALO Output Xtal output.
DRAM Interface
78,80,82,84,
86,88,90,92
RD[15:8]
/ VIO[15:8]
TTL I/O, Slew rate
50K pull_up
Buffer RAM Data / Versatile Input/Output. These pins are the bi-
directional upper Buffer RAM data bus to the external buffer
memory. When an 8-bit DRAM is used, the RD8–RD15 signals
becomes Versatile I/O pins, VIO8–VIO15.
Input 3.3V/5V tolerance, output 3.3V
79,81,83,85,
87,89,91,93
RD[7:0] TTL I/O, Slew rate
50K pull_up
Bi-directional lower Buffer RAM data bus.
Input 3.3V/5V tolerance, output 3.3V
94 CASL_
/ CAS_
TTL Output
Slew rate
Column Address Strobe Low / Column Address Strobe. When
TWE63h.RW6 is 0, this pin is the Column Address Strobe Low
signal for accessing the lower bytes of a two-CAS_ 16-bit DRAM.
When TWE63h.RW6 is 1 or when an 8-bit DRAM is used, this pin
shall be connected to CAS_ of the DRAM.
output 3.3V

16
95 CASH_
/ RWEH_
TTL Output
Slew rate
Column Address Strobe High / RAM Write Enable High. When a
16-bit DRAM is used, this pin functions as Column address Strobe
High for accessing the upper bytes of a two-CAS_ DRAM if
TWE63h.RW6 is 0, or as Write Enable High for writing the upper
bytes of a two-WE_ DRAM.
output 3.3V
96 RWE_
/ RWEL_
TTL Output RAM Write Enable / RAM Write Enable Low. When TWE63h.RW6
is 0 or when an 8-bit DRAM is used, this pin is the active-low write
strobe to the external buffer DRAM. When TWE63h.RW6 is 1, this
pin is the Write Enable Low signal for writing the lower bytes of a
two-WE_ 16-bit DRAM.
output 3.3V
97 RAS_ TTL Output
Slew rate
Row Address Strobe.
This output is the Row Address Strobe signal to the buffer DRAM.
output 3.3V
98 DVDD3 Power(3.3V) 3.3V power pin for digital circuitry.
99~103
105~108
RA[8:0] TTL I/O, Slew rate
50K pull_down
Buffer RAM Address.
These pins are the address bus to the external buffer DRAM.
output 3.3V
104 DGND Ground Ground pin for internal digital circuitry.
Audio Interface
117 ADGO
/ VIO0
TTL I/O, Slew rate
SMT, 50K pull_up
Digital Audio Output / Versatile I/O 0. The signal is either the Digital
Audio Output which supplies the IEC-958 digital audio data when
A0SEL00h.RW7=1 and ADOE2Eh.RW0=1, or the Versatile I/O 0
pin otherwise.
Internal Audio DAC Interface
109 DACVSS Ground Ground pin for internal DAC circuitry.
110 RO Analog Output Right channel of audio.
111 DACVREF Analog Output Reference voltage for external audio filter circuit.
112 LO Analog Output Left channel of audio.
113 DACVDD Analog
Power(3.3V)
Power pin for internal DAC circuitry.
Varipitch VCO Interface
114 VPVDD Analog
power(3.3V)
Power pin for varipitch VCO circuitry.
115 VCOCIN Analog Input Connect capacitor for compensator loop filter.
116 VPVSS Ground Ground pin for varipitch VCO circuitry.
Host Interface
118 DEVSEL TTL Input
50K pull_up
Device Select. Cleared to zero indicates the MT1199 is master
device. Set to one indicates the MT1199 is slave device.
119 DASP_ TTL I/O
50K pull_up
Device Active / Device 1 Present. This is a time-multiplexed signal
which indicates that a device is active, or that Device 1 is present. A
10K-ohm pull-up resistor shall be connected to this signal
externally.