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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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