Instructions

51 C-Control Pro IDE

An LCD module can be plugged onto the application board. It displays 2 lines at 8 characters each.

In general also differently organized displays can be operated through this interface. Each character

consists of a monochrome matrix of 5x7 pixels. A flashing cursor below any one of the characters

will indicate the current output position. The operating system provides a simple software interface

for output on the display. This display is connected to connector X14 (16 poles, double row). By

means of a mechanical protection a faulty connection and thus the confusing of poles is avoided.

The LCD module used is of type Hantronix HDM08216L-3. Further information can be found on the

Hantronix Webseite http://www.hantronix.com and in the data sheet list on the CD-ROM.

The display is operated in the 4-Bit data mode. Data bits are set to the EXT-Data output, and then

clocked into the 74HC164 shift register with triggering EXT-SCK. When LCD-E is set, the 4 Bits are

applied to the display.

LCD Contrast (LCD ADJ)

Direct frontal view will allow best readability of the LCD characters. If necessary the contrast must be

trivially re-adjusted. The contrast can be adjusted by means of potentiometer PT1.

Keyboard

For user inputs a 12 character keyboard (0..9,*,#) is provided (X15: 13 pole connector). The keyboard

is organized 1 out of 12, i. e. there is one line assigned to each key. The keyboard information is

read-in serially through a shift register. If no keyboard is used the 12 inputs can be used as addi-

tional digital inputs. The keyboard uses a 13 pole terminal (single row) and is plugged to X15 in such

a way that the keys will point towards the application board.

With activating the PL (parallel load - KEY-E) input of the 74HC165 all 12 keyboard wires are trans-

ferred in the 74HC165 shift register. After that all information bits are latched to Q7 with triggering of

CP (clock input - EXT-SCK). There they can be read with the EXT-Data Port. Since one 74HC165

holds only 8 Bit information, Q7 of the 1st 74HC165 is connected with DS of the 2nd 74HC165.

SRAM

The application board holds an SRAM chip (K6X1008C2D) made by Samsung. By using this the

available SRAM memory is extended to 64kByte. Mentioned SRAM uses Ports A, C and partly

G for triggering. If the SRAM is not used then it can be de-activated by JP7 and then these

ports become available to the user.

To deactivate the SRAM the jumper JP7 has to be moved to the left side (orientation: serial inter-

face shows to the left), such that the left pins of JP7 are connected.

Even though the used RAM chip has a capacity of 128kb only 64kb can be used for reason

of the memory model.