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PaxInstruments / t400-electronics

Electronics for the Pax Instruments T400 temperature datalogger
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Review Arduino pinmap on silkscreen #142

Closed charlespax closed 9 years ago

charlespax commented 9 years ago

Make sure the Arduino pinmap on the silkscreen is accurate. This should be the last issue addressed before ordering PCBs.

samchoy88 commented 9 years ago

Here is the silkscreen and schematic on Rev 0.10:

Pin map silkscreen position: image

Pin Map on silk screen: image

Pin map on Schematic: image

charlespax commented 9 years ago

Here is the Arduino Leonardo pinmap. Does everything match? Is the silkscreen accurate? screen shot 2015-01-26 at 06 57 08

samchoy88 commented 9 years ago

Are you sure the above pin mapping suitable for our project? As I found T400 dos not connect UVcc to +5V and datasheet of ATmega32u4 also suggest not connect +5V to UVcc while I/O using 3.0V to 3.6V.

Reference: (Page 256) http://www.atmel.com/images/doc7766.pdf image

charlespax commented 9 years ago

The image I reference above is for the Arduino Leonardo. It is only used to correlate between physical pins on the ATmega32U4 and their Arduino digital/analog designations.

Don't worry about it, I'll take care of this issue.

charlespax commented 9 years ago

Information taken from hardware/arduino/avr/variants/leonardo/pins_arduino.h

ATmega32U4 Arduino
1 D7
2 Vcc
3 USB D-
4 USB D+
5 UGND
6 UCAP
7 VBUS
8 D17, RXLED
9 D15, SCK
10 D16, MOSI
11 D14, MISO
12 D11
13 RESET
14 Vcc
15 GND
16 XTAL2
17 XTAL1
18 D3, SCL
19 D2, SDA
20 D0
21 D1
22 TXLED
23 GND
24 AVcc
25 D4, A6
26 D12, A11
27 D6, A7
28 D8, A8
29 D9, A9
30 D10, A10
31 D5
32 D13
33 HWB
34 Vcc
35 GND
36 D18, A0
37 D19, A1
38 D20, A2
39 D21, A3
40 D22, A4
41 D23, A5
42 AREF
43 AGND
44 AVcc
samchoy88 commented 9 years ago

Yes, the Digital and Analog pin mapping are match with T400

charlespax commented 9 years ago

Here is the pinmap for the current version of the T400. The pinmap, schematic, and silkscreen all match.

Arduino ATmega32U4 T400
D0 20 SW_B
D1 21 SW_A
D2 19 SDA
D3 18 SCL
D4, A6 25 LCD_A0
D5 31 BATT_STAT
D6, A7 27 LCD_BL
D7 1 RTC_INT
D8, A8 28 LCD_CS
D9, A9 29 VBAT_SENSE
D10, A10 30 VBAT_EN
D11, A11 12 FLASH_CS
D12 26 LCD_RST
D13 32 SW_C
D14 11 MISO
D15 9 SCK
D16 10 MOSI
D17 8 SD_CS
A0, D18 36 DATA2
A1, D19 37 DATA1
A2, D20 38 SW_D
A3, D21 39 SW_E
A4, D22 40 SW_PWR
A5, D23 41 PWR_ONOFF

screen shot 2015-01-26 at 16 33 22 screen shot 2015-01-26 at 16 34 20

charlespax commented 9 years ago

All good. Closing issue.