Zilog Z8F0411 Manuel d'utilisateur Page 45

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MDS General-Purpose Board Development Kit
User Manual
UM016905-1207 Appendix—MDS-PM Board Pin Maps
34
eZ80Acclaim!
®
MCUs
Spare Pins
PD6 (DCD input) and PC4 (DTR output).
LCD Control
The LCD has two different modes of operation, 4-bit bus mode and I
2
C
drive mode, controlled by jumper J26:
J26 OFF, LCD bus mode enabled
J26 ON, LCD I
2
C drive mode enabled
Bus Mode LCD Control
LCD_EN—PD7 (eZ80F91 MCU alternate function: RI input)
LCD_RS—PC6 (eZ80F91 MCU alternate function: DCD input)
LCD_RW—PB0
LCD_D4—PA4
LCD_D5—PA5
LCD_D6—PA6
LCD_D7—PA7
I
2
C Drive Mode LCD Control
U13 I
2
C bus address: 0100001 R/W
LCD_EN—I
2
C bus expander address 1—D3
LCD_RS—PC6 (eZ80F91 MCU alternate function: DCD input)
LCD_RW—PB0
LCD_D4—I
2
C bus expander address 1—D4
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