PUGAUGE - Low Power Display Processor

Hardware

• 8-Character Segmented LCD 14-segment Display
• Atmel AVR ATmega6490A AVR microcontroller

Build notes

TQFP-100 Breakout board

When soldering the AVR6490 Chip in the TQFP-100 case to it's breakout board, I made an error:

I turned it 90 degrees to the right. Therefore Pin 1 of the chip appears at Pin 76 of the breakout board

This table provides a correction lookup:

Pin of TQFP-100 ATmega6490A	Pin of breakout board	Pin of TQFP-100 ATmega6490A	Pin of breakout board
1	76	51	26
2	77	52	27
3	78	53	28
4	79	54	29
5	80	55	30
6	81	56	31
7	82	57	32
8	83	58	33
9	84	59	34
10	85	60	35
11	86	61	36
12	87	62	37
13	88	63	38
14	89	64	39
15	90	65	40
16	91	66	41
17	92	67	42
18	93	68	43
19	94	69	44
20	95	70	45
21	96	71	46
22	97	72	47
23	98	73	48
24	99	74	49
25	100	75	50
26	1	76	51
27	2	77	52
28	3	78	53
29	4	79	54
30	5	80	55
31	6	81	56
32	7	82	57
33	8	83	58
34	9	84	59
35	10	85	60
36	11	86	61
37	12	87	62
38	13	88	63
39	14	89	64
40	15	90	65
41	16	91	66
42	17	92	67
43	18	93	68
44	19	94	69
45	20	95	70
46	21	96	71
47	22	97	72
48	23	98	73
49	24	99	74
50	25	100	75

Connecting LCD to ATmega6490 MCU

LCD pin number	MCU pin name	MCU pin number	BBR pin number
pin_1	SEG2	72	47
pin_2	SEG3	71	46
pin_3	SEG6	68	43
pin_4	SEG7	66	41
pin_5	SEG10	63	38
pin_6	SEG11	58	33
pin_7	SEG14	55	30
pin_8	SEG15	54	29
pin_9	SEG18	51	26
pin_10	SEG19	50	25
pin_11	SEG22	47	22
pin_12	SEG23	46	21
pin_13	SEG26	43	18
pin_14	SEG27	41	16
pin_15	SEG30	38	13
pin_16	SEG31	37	12
pin_17	COM3	75	50
pin_18	COM2	76	51
pin_19	COM1	77	52
pin_20	COM0	78	53
pin_21	SEG28	40	15
pin_22	SEG29	39	14
pin_23	SEG24	45	20
pin_24	SEG25	44	19
pin_25	SEG20	49	24
pin_26	SEG21	48	23
pin_27	SEG16	53	28
pin_28	SEG17	52	27
pin_29	SEG12	57	32
pin_30	SEG13	56	31
pin_31	SEG8	65	40
pin_32	SEG9	64	39
pin_33	SEG4	70	45
pin_34	SEG5	69	44
pin_35	SEG0	74	49
pin_36	SEG1	73	48