MX-GA3V
1-24
2. Block diagram
Name Number I/O Definition
VSS 1,25:26,31,72,75,77,91,100 I Ground.
VCC 5,16,32,66,73,78,90 I Voltage supply, 5 V.
DSC_C 6 I Clock for programming to access internal registers.
AUX0 7 I/O Servo Forward or Control Pin.
AUX1 9 I/O Servo Reverse or Control Pin.
AUX2 11 I/O Servo LDON or Control Pin.
AUX3 70 I/O Servo CW/Limit or Control Pin.
AUX4 69 I/O Servo CCW/Close or Control Pin.
AUX5 68 I/O Servo Data or Control Pin.
AUX6 67 I/O Servo XLAT or Control Pin/VFD_DO.
AUX7 14 I/O Servo BRKM/Sense or Control Pin/VFD_DI.
AUX8 18 I/O Servo Mute/Open or Control Pin/VFD_CLK.
AUX9 20 I/O Servo SQS0 or Control Pin.
AUX10 34 I/O Servo SQCK or Control Pin.
AUX11 35 I/O 3880 IRQ or Interrupt Output or Control Pin.
AUX12 36 I/O CD C2PO or Interrupt Input or Control Pin.
AUX13 38 I/O Serial Interrupt/CD-Mute or Control Pin.
AUX14 39 I/O Servo SCOR (S0S1) or Interrupt Input or Control Pin.
AUX15 40 I/O Interrupt Input or Control Pin.
DSC_D[7:0] 81,83,85,93,95,97,99,8 I/O Data for programming to access internal registers.
DSC_S 10 I Strobe for programming to access internal registers.
DCLK
12
O Dual-purpose pin DCLK is the MPEG decoder clock.
EXT_CLK I EXT_CLK is the external clock EXT_CLK is an input during bypass PLL mode.
RESET_B 13 I Video reset (active-low).
MUTE 15 O Audio mute.
MCLK 17 I Audio master clock.
TWS
19
I Dual-purpose pin TWS is the transmit audio frame sync.
SPLL_OUT O
SPLL_OUT is the select PLL output.
TSD 21 I Transmit audio data input.
TBCK 22 I Transmit audio bit clock.
RWS
23
O Dual-purpose pin RWS is the receive audio frame sync.
SEL_PLL1 I Pins SEL_PLL[1:0] select the PLL clock frequency for the DCLK output.
RSTOUT_B 24 O Reset output (active-low).
NC 2:4,27:30,76 No connect. Do not connect to these pins.
RSD
33
O Dual-purpose pin. RSD is the receive audio data input.
SEL_PLL0
I SEL_PLL0 along with SEL_PLL1 select the PLL clock frequency for the DCLK output. See the
table for pin number 23.
RBCK
37
O Dual-purpose pin. RBCK is the receive audio bit clock.
SER_IN
I SER_IN is the serial input DSC mode.
0 - Parallel DSC mode.
1 - Serial DSC mode.
VSSAA 41,51 I Audio Analog Ground.
VCM
42
I ADC Common Mode Reference (CMR) buffer output. CMR is approximately 2.25 V. Bypass to
analog ground with 47 µF electrolytic in parallel with 0.1 µF.
VREFP 43 I DAC and ADC maximum reference. Bypass to VCMR with 10 µF in parallel with 0.1 µF.
VCCAA 44 I Analog VCC, 5 V.
AOR+, AOR- 45:46 O Right channel output.
AOL-, AOL+ 47:48 O Left channel output.
MIC1 49 I Microphone input 1.
MIC2 50 I Microphone input 2.
VREF
52
I Internal resistor divider generates Common Mode Reference (CMR) voltage. Bypass to ana-
log ground with 0.1 µF.
VREFM 53 I DAC and ADC minimum reference. Bypass to VCMR with 10 µF in parallel with 0.1 µF.
RSET 54 I Full scale DAC current adjustment.
COMP 55 I Compensation pin.
VSSAV 56:57,62:63 I Video Analog Ground
CDAC 58 O Modulated chrominance output.
VCCAV 59,60 I Video VCC, 5 V
YDAC 61 O Y luminance data bus for screen video port.
VDAC 64 O Composite video output.
ACAP 65 I Audio CAP
XOUT 71 O Crystal output.
XIN 74 I 27 MHz crystal input.
PCLK 79 I/O 13.5 MHz pixel clock.
2XPCLK 80 I/O 27 MHz (2 times pixel clock).
HSYN_B 82 O Horizontal sync (active-low).
VSYN_B 84 O Vertical sync (active-low).
YUV[7:0] 86:89,92,94,96,98 I YUV data bus for screen video port.
* Shading indicates a pin change from ES3209.
SEL_PLL1 SEL_PLL0 DCLK
0 0 Bypass PLL (input mode)
0 1 27 MHz (output mode)
1 0 32.4 MHz (output mode)
1 1 40.5 MHz (output mode)
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