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Figure1-11
figure1-18System LCD interfaces
Serial
Signal
No.
name
1
LCD_A
2
LCD_K
3
VSS
4
VDD
5
RS
6
R/W
7
E
8
CS1
9
NA
10
D0
11
VSS
12~14
D1~D3
15
VSS
16~19
D0~D7
20
VSS
3. Keypad unit
In the ETS2000 series FWTs, the keypad is a peripheral component. If it is broken,
it can be directly replaced. Then note the use the correct version of the structure
suite. The interface between the system and the keypad is shown by Table 1-1.
Presented below is the circuit principle:
LCD Hardware interfaces
Direction
Signal function description
O
LED back facet (+)
O
LED back facet (-)
--
Ground
--
Power: (2.84V)
High The BUS is in data
O
transmission status L:
Command status
O
Read/write signal.
O
Enabling signal
O
chip selection signal (IC1)
Reserved pin
O
8-Bit BUS bit
--
Ground
O
8-Bit BUS bit
O
Ground
O
8-Bit BUS bit
--
Ground
11
Remarks
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