EM78860H View Datasheet(PDF) - ELAN Microelectronics
Part Name
Description
Manufacturer
EM78860H Datasheet PDF : 26 Pages
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EM78P860
8 -BIT MICRO-CONTROLLER
3. IOC6 ~ IOC9 ( I/O Port Control Register )
• Five I/O direction control registers.
• “1” put the relative I/O pin into high impedance, while “0” put the relative I/O pin as output.
• User can see IOCB register how to switch to normal I/O port.
4. IOCA (RAM,IO ,PAGE Control Register)(read/write,initial “00000000”)
7
P8SH
6
P8SL
5
4
3
2
1
0
0
CALL_4 CALL_3 CALL_2 CALL_1
0
• Bit0 unused
• Bit4~Bit1: ”000" to “1001” are ten blocks of RAM area. User can use 2.5K RAM with RC ram address.
• Bit 5 unused
• Bit6: port8 low nibble switch, 0/1= normal I/O port/SEGMENT output .
• Bit7: port8 high nibble switch , 0/1= normal I/O port/SEGMENT output
5. IOCB (LCD ADDRESS)
PAGE0 : Bit6 ~ Bit0 = LCDA6 ~ LCDA0
The LCD display data is stored in the data RAM . The relation of data area and COM/SEG pin is as below:
COM15 ~ COM8
40H (Bit15 ~ Bit8)
41H
:
:
7BH
7CH
7DH
7EH
7FH
COM7 ~ COM0
00H (Bit7 ~ Bit0)
01H
:
:
3BH
3CH
3DH
3EH
3FH
SEG0
SEG1
:
:
SEG59
Empty
Empty
Empty
Empty
PAGE1 : 8 bit up-counter (COUNTER1) preset and read out register . ( write = preset ) . After an interruption,
it will count from “00”.
6. IOCC (LCD DATA)
PAGE0 : Bit7 ~ Bit0 = LCD RAM data register
PAGE1 : 8 bit up-counter (COUNTER2) preset and read out register. (write=preset) After a interruption, it will
count from "00".
7. IOCD (Pull-high Control Register)
7
6
5
4
3
2
1
0
PH7
PH6
PH5
PH4
PH3
PH2
PH1
PH0
• Bit 0 ~ 7 (/PH#) Control bit used to enable the pull-high of PORT7(#) pin.
1: Enable internal pull-high
0: Disable internal pull-high
* This specification is subject to be changed without notice.
4.17.2000 10
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