Zilog Z8F0411 - Manual (Page 45)

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