5811 Datasheet, PDF (3/11 Pages) Allegro MicroSystems – BiMOS II 12-BIT SERIAL-INPUT, LATCHED SOURCE DRIVERS

application boards
The connections for the QVGA and ethernet boards are very similar, but for practical convenience and
simplicity one socket is dedicated to each type. It is possible to use both modules at once.
The common module interface is described first.
Module Bus Connectors JP11, JP12
The following table describes the general module interface pinout.
Pin Signal
1 VCC
2 GND
3 D1
4 D0
5 D3
6 D2
7 D5
8 D4
9 D7
10 D6
11 VCC
12 GND
13 A1
14 A0
15 A3
16 A2
17 A5
18 A4
19 A7
20 A6
21 A9
22 A8
23 VCC
24 GND
25 A11
26 A10
27 A13
28 A12
29 A15
30 A14
31 HWR/
32 A16
33 WAIT/
34 RD/
35 RESET/
36 SELECT/
37 SDA
38 SCL
39 VCC
40 GND
Description
+5V supply
Ground
Data bus
+5V supply
Ground
Address bus
+5V supply
Ground
Address bus
Write strobe
Address bus
Delays write cycle
Read Strobe
System Reset
See below
I²C data
I²C clock
+5V supply
Ground
Implementation on the application board
SDA and SCL are from the VM-1's I²C Bus 1.
The SELECT/ line is different for each module.
In the Venom language, The MAKE statements for the QVGA display, touch screen and ethernet interface
have parameters which select the I²C bus and the correct module's SELECT/ signal.
Ethernet Module
Connection
If an ethernet module 5811 is required, plug it into the ethernet module socket and secure it with a 6mm
spacer, M2.5 screw and nut using hole MT6. A second spacer and mounting screw in MT4 is optional.
Use a length of CAT5 UTP cable to connect the ethernet board to a hub or switch that will support 10Mbit
operation. Exceptionally when the VM-1 is one end of a two-node network you can link the nodes directly with
a UTP "crossover" cable.
Doc 44306 V20041130
VM-1 Application Board 3 (Issue A)
Page 3 of 11