EM73866
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
PIN DESCRIPTIONS
Symbol
Pin-type
Function
P8.0(INT1)/WAKEUPA I/O-S
P8.2(INT0)/WAKEUPC
2-bit bidirection I/O pins with interrupt 0, 1 external intput and
IDLE/STOP releasing function
mask option : wakeup disable, low current push-pull
wakeup disable, normal current push-pull
wakeup disable, open-drain
wakeup enable, low current push-pull
wakeup enable, normal current push-pull
LCD common pins
COM(0..3)
SEG(0..29)
V1, V2, V3, VRLC
--
--
--
LCD segment pins
LCD bias pins
FUNCTION DESCRIPTIONS
PROGRAM ROM ( 8K X 8 bits )
8 K x 8 bits program ROM contains user's program and some fixed data.
The basic structure of the program ROM may be categorized into 5 partitions.
1. Address 0000h: Reset start address.
2. Address 0002h - 000Ch : 6 kinds of interrupt service routine entry addresses.
3. Address 000Eh - 0086h : SCALL subroutine entry address, only available at 000Eh, 0016h, 001Eh, 0026h, 002Eh,
0036h, 003Eh, 0046h, 004Eh, 0056h, 005Eh, 0066h, 006Eh, 0076h, 007Eh, 0086h.
4. Address 0000h - 07FFh : LCALL subroutine entry address.
5. Address 0000h - 1FFFh : Except used as above function, the other region can be used as user's program and
data region.
* This specification are subject to be changed without notice.
12.29.1999
4
ELAN [ ELAN MICROELECTRONICS CORP ]
