EM73P461A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
PIN DESCRIPTIONS
Symbol
Pin-type
Function
P8.0(INT1)
I/O-S
2-bit bidirection I/O port with external interrupt source input and IDLE
/WAKEUPA/DIN,
releasing function
P8.2(INT0)/WAKEUPC
P8.0/DIN : data input for programming OTP
mask option :
wakeup enable, low current push-pull
wakeup enable, normal current push-pull
wakeup disable, open-drain
wakeup disable, low current push-pull
wakeup disable, normal current push-pull
P8.1(TRGB)
/WAKEUPB/DOUT,
P8.3(TRGA)
I/O-S
2-bit bidirection I/O port with time/counter A,B external input and IDLE
releasing function
P8.1/DOUT : data output for programming OTP
/WAKEUPD
mask option :
wakeup enable, low current push-pull
wakeup enable, normal current push-pull
wakeup disable, open-drain
wakeup disable, low current push-pull
wakeup disable, normal current push-pull
SOUND
Melody output
VA,VB, V1, V2, V3
COM0~COM3
SEG0~SEG31
TEST/VPP
Connect the capacitors for LCD bias voltage
LCD common output pins
LCD segment output pins
Test pin must be floating
VPP : high vlotage (12V) power source for programming OTP
FUNCTION DESCRIPTIONS
PROGRAM ROM (4K X 8 bits)
4 K x 8 bits program ROM contains user's program and some fixed data.
The basic structure of program ROM can be divided into 5 parts.
1. Address 000h: Reset start address.
2. Address 002h - 00Ch : 6 kinds of interrupt service routine entry addresses.
3. Address 00Eh-086h : SCALL subroutine entry address, only available at 00Eh,016h,01Eh,026h, 02Eh,
036h, 03Eh, 046h, 04Eh, 056h, 05Eh, 066h, 06Eh, 076h, 07Eh, 086h.
4. Address 000h - 7FFh : LCALL subroutine entry address.
5. Address 000h - FFFh : Except used as above function, the other region can be used as user's program region.
* This specification are subject to be changed without notice.
12.27.2001
4
ELAN [ ELAN MICROELECTRONICS CORP ]
