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EM73461A Datasheet(PDF) 3 Page - ELAN Microelectronics Corp |
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EM73461A Datasheet(HTML) 3 Page - ELAN Microelectronics Corp |
3 / 33 page 3 * This specification are subject to be changed without notice. EM73461A 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 1.5.2001 Preliminary Symbol Pin-type Function SOUND disable, low current push-pull SOUND disable, normal current push-pull SOUND disable, high current push-pull P4.1/TRGH I/O-Q 1-bit bidirection I/O port with HTC external input mask option : NMOS open-drain PMOS open-drain low current push-pull normal current push-pull high current push-pull P4(2,3) I/O-Q 2-bit bidirection I/O port with high current source mask option : NMOS open-drain PMOS open-drain low current push-pull normal current push-pull high current push-pull P8.0(INT1)/WAKEUPA, I/O-S 2-bit bidirection I/O port with external interrupt source input and IDLE P8.2(INT0)/WAKEUPC releasing function 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 I/O-S 2-bit bidirection I/O port with time/counter A,B external input and IDLE P8.3(TRGA)/WAKEUPD releasing function 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 Connect the capacitors for LCD bias voltage COM0~COM3 LCD common output pins SEG0~SEG31 LCD segment output pins TEST Tie Vss as package type, no connecting as COB type. PIN DESCRIPTIONS 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. |
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