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9.3.2 Fu n ction s
Con trol is effected for th e pu sh -switch es to be u sed wh en th e u ser ch an g es th e parameters, in order to modify th e
respecti v e settin g v alu e s. Wh eth er th e s witch h as been p ressed is iden ti fied with th e switch in pu t lev el th at is
tu rn ed " L" .
Each switch in pu t port is pu lled u p at ou tside of ASIC.
Each para meter is stored i n th e EEPROM, th e con ten ts of wh ic h are u pdated as requ ired.
9.4 Con t rol of defin i tion co n v erter LSI I300.
9.4.1 Ports related to con trol
Pin No.
159
5
6
9.4.2 Fu n ction s
Majo r fu n cti on of I300 are as foll ows:
(1) Expan sion of th e displa y screen .
(2) Timi n g con trol for v ariou s sig n a l ty pes.
(3) Power-su pp ly sequ en c e (LCD pa n el).
2
9.5 I
C bu s con trol
9.5.1 Re lated ports of I303
Port
P1.7
P1.6
2
9.5.2 I
C-con trolle d fu n ction s
Th e follo win g fu n ction al c on trols are effec ted by I
(1) Con t rol o f EEPROM I304 for p arame ter setti n g .
Ci rcu i t D escri p ti on
I/O
Signal name
I
IRQ
interrupt signal
I/O
SCL
serial clock
I/O
SDA
serial data
Pin No.
I/O
Signal name Function
14
O
SCL
13
I/O
SDA
2
C.
Function
IIC bus clock
IIC bus data
A L 502
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