Difference between revisions of "Testpads"

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(→‎Pinouts)
(Cluster C pad 11 is a 1v8 power rail)
 
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{| class=wikitable
 
{| class=wikitable
 
! Pad # || Name || Type || Levels || Continuity || Frequency || Comment
 
! Pad # || Name || Type || Levels || Continuity || Frequency || Comment
 +
|-
 +
| 1 ||  || DBVDD || || || || from ALC5639 pin 43
 
|-
 
|-
 
| 2 || D+ || USB-C || || || || Cluster B - 3
 
| 2 || D+ || USB-C || || || || Cluster B - 3
 
|-
 
|-
 
| 3 || D- || USB-C || || || || Cluster B - 2
 
| 3 || D- || USB-C || || || || Cluster B - 2
 +
|-
 +
| 4 || +3.3V || XRST || || || || from M92T36 pin 4
 +
|-
 +
| 5 || +3.3V || VSVR || || || || from M92T36 pin 6
 +
|-
 +
| 5(b) || VUSB || VB || || || || from M92T36 pin 9
 +
|-
 +
| 6 || GND ||  || || || ||
 
|}
 
|}
−
 
  
 
=== Cluster C ===
 
=== Cluster C ===
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| 1 || ?? || || 0-1.8V || || || No clue. This is definitely important, we just have no idea how. May need to interface with dock for comms.
 
| 1 || ?? || || 0-1.8V || || || No clue. This is definitely important, we just have no idea how. May need to interface with dock for comms.
 
|-
 
|-
−
| 2 || UART-A RX || || 0-1.8V || || ||
+
| 2 || UART-A TX || || 0-1.8V || || ||
 
|-
 
|-
−
| 3 || UART-A TX || || 0-1.8V || || ||
+
| 3 || UART-A RX || || 0-1.8V || || ||
 
|-
 
|-
 
| 4 || ?? || || 0-1.8V || || ||  
 
| 4 || ?? || || 0-1.8V || || ||  
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| 10 || ?? || || 0-1.8V || || ||  
 
| 10 || ?? || || 0-1.8V || || ||  
 
|-
 
|-
−
| 11 || ?? || || 0-1.8V || || ||  
+
| 11 || +1.8V || || 0-1.8V || || ||  
 
|}
 
|}
  
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{| class=wikitable
 
{| class=wikitable
 
! Pad # || Name || Type || Levels || Continuity || Frequency || Comment
 
! Pad # || Name || Type || Levels || Continuity || Frequency || Comment
 +
|-
 +
| 1 || GND || || || || ||
 
|-
 
|-
 
| 4 || Seaker L + || || || || || Speaker Left +
 
| 4 || Seaker L + || || || || || Speaker Left +
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|-
 
|-
 
| 10 || Reset || || || || ||
 
| 10 || Reset || || || || ||
 +
|-
 +
| 11 || Vdd Referance|| || || || ||
 
|}
 
|}
  
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{| class=wikitable
 
{| class=wikitable
 
! Pad # || Name || Type || Levels || Continuity || Frequency || Comment
 
! Pad # || Name || Type || Levels || Continuity || Frequency || Comment
 +
|-
 +
| 2 || GND || || || || ||
 
|-
 
|-
 
| 4 || Vol(+) || || || || || Button Vol (+)
 
| 4 || Vol(+) || || || || || Button Vol (+)
 +
|-
 +
| 5 || Li-Ion Batt Vdd Mirror || || || || || Power Supply
 
|-
 
|-
 
| 9 || BUTTON_HOME || || || || || RCM strap
 
| 9 || BUTTON_HOME || || || || || RCM strap
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| 5 || USB-PWR-WAVE? || Square wave || 0V-3.3V || A-9, A-10? || ~11 Hz || Appears to mirror K4. Duty cycle 66.67%. Low on screen lock. Off until first interaction.
 
| 5 || USB-PWR-WAVE? || Square wave || 0V-3.3V || A-9, A-10? || ~11 Hz || Appears to mirror K4. Duty cycle 66.67%. Low on screen lock. Off until first interaction.
 
|-
 
|-
−
| 6 || USB-C V+ || Supply power || || || ||
+
| 6 || USB-C V+ || Supply power || || || || support fast charger : "normal mode = 5V+"  "Fast changer = 12V+"
 
|-
 
|-
 
| 7 || Unknown || Power supply? || ~3V-0V || None known || N/A || 0 when usb-c not plugged in, falls slowly on first interaction if USB-C plugged in. Power draw related?
 
| 7 || Unknown || Power supply? || ~3V-0V || None known || N/A || 0 when usb-c not plugged in, falls slowly on first interaction if USB-C plugged in. Power draw related?

Latest revision as of 01:58, 5 March 2019

The Nintendo Switch mainboard has a series of testpads on the front and back, presumably used in factory test, diagnostics, and early board bringup procedures.

Raw Logic captures

These are reference materials, taken from poking at I/O on various testpads. https://github.com/hedgeberg/Switch-Logic-Captures

Photos

Switchre side1.jpg Switchre side2.jpg

Pinouts

Cluster A

Pad # Name Type Levels Continuity Frequency Comment
1 Batt GND?
2 Battery pulse? Pulse train 0-3.3V L-5?
3 Battery Vdd
4 ?? Square wave 0-3.3V 329kHz? (undersampled?) Square wave when screen on, but looks like vias to Speaker R
5 ?? Square wave 0-3.3V 329kHz? (undersampled?) Square wave when screen on, but looks like vias to Speaker R
6 Weak GND?
7 SDA I2C 0-1.8V
8 SCL I2C 0-1.8V
9 USB-PWR-WAVE? Square wave 0-3.3V K-4, K-5? ~11 Hz
10 USB-PWR-WAVE? Square wave 0-3.3V K-4, K-5? ~11 Hz

Cluster B

Pad # Name Type Levels Continuity Frequency Comment
1 DBVDD from ALC5639 pin 43
2 D+ USB-C Cluster B - 3
3 D- USB-C Cluster B - 2
4 +3.3V XRST from M92T36 pin 4
5 +3.3V VSVR from M92T36 pin 6
5(b) VUSB VB from M92T36 pin 9
6 GND

Cluster C

Pad # Name Type Levels Continuity Frequency Comment
1 ?? 0-1.8V No clue. This is definitely important, we just have no idea how. May need to interface with dock for comms.
2 UART-A TX 0-1.8V
3 UART-A RX 0-1.8V
4 ?? 0-1.8V
5 ?? 0-1.8V
6 ?? 0-1.8V
7 ?? 0-1.8V
8 ?? 0-1.8V
9 ?? 0-1.8V
10 ?? 0-1.8V
11 +1.8V 0-1.8V

Cluster D

Pad # Name Type Levels Continuity Frequency Comment
1 GND
4 Seaker L + Speaker Left +
5 Seaker L - Speaker Left -

Cluster E

Pad # Name Type Levels Continuity Frequency Comment
1 Vol (-) Button Vol (-)
10 Reset
11 Vdd Referance

Cluster G

Pad # Name Type Levels Continuity Frequency Comment
2 GND
4 Vol(+) Button Vol (+)
5 Li-Ion Batt Vdd Mirror Power Supply
9 BUTTON_HOME RCM strap

Cluster I

Pad # Name Type Levels Continuity Frequency Comment
1 GND
2 Screen_on On/Off 0-1.8V Screen power state, active high
3 UART 0-1.8V 1.5MBaud?
4 UART 0-1.8V 1.5MBaud?
5 Flow control 0-1.8V Flow control for pad I-4?
6 0-1.8V Needs testing with chip/touch screen interface board plugged in

Cluster J

Pad # Name Type Levels Continuity Frequency Comment
1 ? Edge 0-1.8V Turns on around same time as pad J-3
2 GND
3 ? Edge 0-1.8V Turns on around same time as pad J-1, slightly after
4 Power button Pushbutton 4V-0V Active low
5 ? Constant? 0V Ground?-NT
6 ? Edge 0-1.8V Turns on with pad J-6, ~1s after J-1/J-3
7 ? Edge 0-1.8V Turns on with pad J-5, ~1s after J-1/J-3
8 ? Edge? 0-1.8V Turns on ~1s after J-6/J-7, turns off at unknown point

Cluster K

Pad # Name Type Levels Continuity Frequency Comment
1 GND
2 D- USB-C Cluster B - 3
3 D+ USB-C Cluster B - 2
4 USB-PWR-WAVE? Square wave 0V-3.3V A-9, A-10? ~11 Hz
5 USB-PWR-WAVE? Square wave 0V-3.3V A-9, A-10? ~11 Hz Appears to mirror K4. Duty cycle 66.67%. Low on screen lock. Off until first interaction.
6 USB-C V+ Supply power support fast charger : "normal mode = 5V+" "Fast changer = 12V+"
7 Unknown Power supply? ~3V-0V None known N/A 0 when usb-c not plugged in, falls slowly on first interaction if USB-C plugged in. Power draw related?

Cluster L

TODO: Update diagram

Pad # Name Type Levels Continuity Frequency Comment
1 Li-Ion Batt Vdd Mirror Power Supply Std. Li-Ion
2 GND
3 Li-Ion Batt Vdd Battery Input Std. Li-Ion
4 Mirrored Ground? Holds steady @ 0, looks like a decoupled isolated ground
5 Battery pulse? <1 Hz Duty cycle ~0%
6 GND
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