THIS IS THE TrxAVR FROM THE COMBO PANEL

Nov 22, 2010 - PWM TO DISPLAY. CS TO DISPLAY ... 20 socket for "J6" on 'simple' Trxavrb on Combo Panel. 20pin dual row IDC socket. GND. +5V LCD. D0.
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THIS IS THE TrxAVR FROM THE COMBO PANEL ! 24-28-29

part only shown

SPARES D

D

J15

1k

PL2 R63 R62 PL1 PL0 R61

1 2 3

1k

1k

S-1 S-2 S-3

Cable wiring detail for 320x240 display

3 HEADER

TO J3 Q4 BC547B

R120 1K

PL3

BL_POS

RxD3

R39 R40 R41 R42 R43 R44 R45 R46

1K 1K 1K 1K 1K 1K 1K 1K

1K 1K 1K

RD* WR* A0

PD7 1K 1K 1K

TOPWAY DISPLAY

GRAPHICAL DISPLAY PWM TO DISPLAY RES TO DISPLAY CS TO DISPLAY

reset

CS

RD* WR* A0

RD* WR* A0

R108

Vee 20 19 18 17 16 GND 15 D7 14 13 D5 12 11 D3 10 9 D1 8 7 6 5 4 3 2 1

20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

D6 D4 D2 D0

+5V LCD GND

BL- "Kathode" BL+ "Anode" VEE

backlighting

D7 D6 D5 D4 D3 D2 D1 D0 RESET A0 CS RD* WR* CONTRAST 5V GND

C

20PIN 20pin dual row IDC socket

NOT FITTED

A_PL7 A_PL6 A_PL5

socket for "J6" on 'simple' Trxavrb on Combo Panel

SEE DISPLAY PAGE

Vee 20 19 A_PL5 18 17 16 BL_POS 15 14 J2-D7 13 J2-D6 12 J2-D5 11 J2-D4 10 J2-D3 J2-D2 9 8 J2-D1 J2-D0 7 6 5 4 3 2 1

4x20 LCD

5V-AVR

2 CONTRAST

R49

R47 R36 R37

FOR COMBO TrxAVR ONLY !

J6

5V-AVR PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 PG1 R38 PG0 R48

320 x 240 GRAPHICS DISPLAY

R121 220R

IC1-38

RxD3

C

topway LM2088s

TX-PTT

TxD3

PA3 PA4 PA5 PA6 PA7 PG2 PJ6 PJ5 PJ4 PJ3 PJ2

3

NF

1

VR1 NF 10k

Vee

1K R109 On Trxavrb PCB, fit R109, delete R108 ( Contrast uses Neg voltage from displays 'Vee')

BL_POS

BL_POS

DISPLAY

B

5V SUPPLY

B

IF BL AUDIBLE ADD, OPTIONAL CAP +5V_LCD

+5V_LCD +

C57 220uF/16V

R112 R113

BACKLIGHT

10R

J16 header 3 pin 0.1"

10R

1 2 3

BL-ve

DIM

PWM A_PL5

A_PL5

R89 10k

CF LCD HAS SEPARATE INPUT FOR BL

R111

Q3 IRLML2502PBF

1K

(Farnell 9102981)

but must remove 2 x 0R resistors on the board

DRAFT

22nd NOV 2010

RESISTOR VALUES DEPEND ON THE ACTUAL DISPLAY. THE VALUES HERE ARE FOR THE eBay DISPLAY. WHICH GIVES BACKLIGHT CURRENT OF ~54mA. (Absolute Max. current for the display is 220mA)

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Updated on:

Updated by:

COMMERCIAL-IN-CONFIDENCE

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NOTTOBE DISCLOSEDWITHOUTWRITTENAUTHORITY

for topway, it may already have resistors fitted on the display Title:

Duty cycle sets the BL brightness. PCB file name:-

Size:

Number:

Issue:

A3

G:\!_COMBO_BB\Combo-other-pcbs\Trxavrb_CorrectVer_BB\Vers for COMBO\interconnect topway 2088 display to combo trxavrb\interconnect topway 2088 display to combo trxavrb.Sch 1

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Printed on: 22-Nov-2010 10:13:19 Sheet 0 of 0 File: G:\!_COMBO_BB\Combo-other-pcbs\Trxavrb_CorrectVer_BB\Vers for COMBO\interconnect topway gp 2088 display to combo trxa

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