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Chapter 4.User Circuitry
4.1.Fitting the Target RSK to the RSK LCD application board
The board is supplied with 2x 24 way sockets, 2x 26 way sockets and 1 x 50 way socket.
These should be soldered on the underside of the host RSK in JA1, JA2, JA5, JA6 and JA4 positions.
The RSK should be plugged into the equivalent connectors on the RSK LCD application board.
4.2.LCD Module
The LCD module on the board is connected to the RSK LCD connector JA4.
It uses ¼ duty cycle and has 4 common lines. There are 8x14 segment starburst characters. Refer to
Figure 4-1: LCD Segment Names.
Each character uses 4 SEG lines. Each SEG line controls 4 segments on the LCD as it uses ¼ duty cycle.
The LCD controller must be programmed for ¼ duty cycle.
In the case of the H838347, a RAM in the LCD controller has 1 bit per segment. Thus each character is a 16 bit number.
The following
Table 4-1: LCD character maps gives the bit mappings for common characters for this controller.
The lowest address (H’F740 in the case of the H838347) represents the rightmost character of the display.
The next word address (H’F742 in the case of the H838347) represents the next character, etc.
A
B
F
E
C
D
G
HI
J
K
N
M
L
X
DP
Figure 4-1: LCD Segment Names
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