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Neuros OSD test points
I had written most of this before I got ill. A brief tidy of the markup, and here it is... A list of the test points on the Neuros OSD board.

TP |
Purpose |
Expectations |
TP1 |
14.31818MHz clock to TVP5150 OSC |
14.31818MHz waveform |
TP2 |
1.8V to TVP5150 |
+1.8V |
TP3 |
3.3V |
+3.3V |
TP4 |
+5V before YPS VREG |
+5V |
TP5 |
+3.3V after TPS VREG |
+3.3V |
TP6 |
Connected to GPIO1 |
? |
TP7 |
SDRAM clock |
SDRAM can clock up to 125MHz... |
TP8 |
SD card DAT2 |
? |
TP9 |
DM320 48MHz clock |
48MHz waveform |
TP10 |
PLL1705 27MHz clock |
27MHz waveform |
TP11 |
Audio clock |
? |
TP12 |
27MHz from PLL |
27MHz waveform (for video encoder) |
TP13 |
!RESET |
High (+3.3V) unless reset |
TP14 |
+3.3V to CF card |
+3.3V |
TP15 |
+3.3V pullup for CF control signals |
+3.3V? |
TP16 |
CF PWR ON signal |
High (+3.3V) if CF powered |
TP17 |
CF ENABLE |
High (+3.3V) if CF enabled |
TP18 |
DM9000 TXVDD |
+3.3V? |
TP19 |
DM9000 25MHz OSC |
25MHz waveform |
TP20 |
+3,3V for network interface |
+3.3V |
TP21 |
Right audio output |
Line level audio |
TP22 |
CVBS video output |
PAL or NTSC composite video signal |
TP23 |
Left audio output |
Line level audio |
TP24 |
Audio clock (at entry to CODEC) |
? 27MHz? |
TP25 |
+3.3V at OPA360 video filter |
|
TP26 |
Raw CV OUT (video prior to filter) |
Akin to a composite video signal? |
TP27 |
Filtered and shaped video signal |
Composite video signal |
TP28 |
Raw composite video input (or S-video luminance) |
Composite video signal |
TP29 |
Video enable, for switching composite video pass-through when powered down |
+3.3V? to control relay |
TP30 |
Power, +3.3V or from CR2032 cell, to MSP430 MCU |
~3.3V |
TP31 |
32.768kHz clock for RTC |
32.768kHz waveform |
TP32 |
MSPRST |
Pulled low to reset MCU |
TP33 |
IR IN |
Raw signal from IR detector |
TP34 |
IRQ from MCU |
High if MSP430 wants to interrupt DM320 |
TP35 |
IR Blaster |
Signal from DM320 |
TP36 |
IR IRQ |
High if MSP430 wants to signal IR to DM320 |
TP37 |
80kHz signal (from DM320) |
80kHz waveform |
TP38 |
Modulated IR waveform for blaster |
Expect PCM at around 38kHz |
TP39 |
USB PWR |
High if USB port is powered |
TP40 |
USB VBUS |
+5V |
TP41 |
+5V raw power input |
+5V |
TP42 |
+5V raw power input, after fuse |
+5V |
TP43 |
Master +3.3V after VREG |
+3.3V |
TP44 |
CVDD after VREG |
? +3.3V? |
Here are the DM320 GPIO assignments:
GPIO00 IN MSP430 IRQ
GPIO01 ? Pulled low, but has TP6
GPIO03 IN MSP430 IR IRQ
GPIO05 IN MS card detect
GPIO06 IN Ethernet IRQ
GPIO07 OUT USB power enable
GPIO08 IN SD card detect
GPIO09 IN CF card detect
GPIO10 OUT TVP5150 PDN (power down)
GPIO12 OUT PLL FS1
GPIO16 OUT LED red
GPIO17 OUT LED green
GPIO25 OUT CF enable
GPIO27 IN Serial RxD
GPIO28 OUT Serial TxD
GPIO29 OUT CF power enable
GPIO30 BI IIC clock
GPIO31 BI IIC data
GPIO32 OUT Enable video
GPIO33 OUT 80kHz
GPIO34 OUT Blaster signal (PWM)
GPIO35 IN SD write protect
GPIO36 OUT CF reset
GPIO37 OUT CF STSCHG
GPIO40 IN? TVP5150 C_WEN (active video area)
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