15
edits
Changes
→Connectors: I added some observations to the connectors from oscilloscope probing
!Pin Number
!Function
!Notes / Observations
|-
|1,2,7,8
|<nowiki>U3 - Vdd | U15 - Pin 4</nowiki>
|
|-
|9, 10, 15, 16, 19, 20, 33, 34
|Ground
|
|-
|2, 8, 18*, 24, 30
| +5VDC
|18 needs more research, may occasionally drop to ground?
|-
|3
|<nowiki>U3 - ICCLK | TP33 | U21 - PCLK</nowiki>
|
|-
|4
|U3 - Vpp/ICCSEL
|
|-
|5
|U3 - RESET
|
|-
|6
|U3 - ICCDATA
|
|-
|11
|J5 - Pin 2
|
|-
|12
|
|3.3v - 2.5KHz square wave (4msec p/p)
|-
|13
|U3 - SW1.4
|
|-
|17
|U3 - SW1.2
|
|-
|18
|U3 - SW1.1
|
|-
|23
|
|Rounded-square wave data bursts
|-
|26
|
|Rounded-square wave data bursts
|-
|31
|BATT POS
|
|-
|36
|U3 - SW1.3
|
|-
|38
|U3 - OCMP1_A / AIN10 / PF4
|Square wave data bursts, 0.2msec per bit
|-
|39
|RED WIRE
|
|-
|40
|Battery voltage
|Around 9VDC measured
|}
!Pin
!Use
!Notes/Observations
|-
|1
|Unknown+5VDC|
|-
|2
|Unknown
|3V rounded square pulses, 2x per second, 2 different periods avg ~75msec?
|-
|3
|Unknown+5VDC|
|-
|4
|Unknown
|5V, 0.1msec pulse once per second
|-
|5
|Unknown+5VDC|
|-
|6
|Unknown
|5V, 0.1msec pulse once per second
|-
|7
|Unknown+5VDC|
|-
|8
|Unknown
|3V, 250msec pulse once per second
|}
These traces go to U14 (SPI mem?)