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EM78P813BQ Datasheet(PDF) 46 Page - ELAN Microelectronics Corp |
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EM78P813BQ Datasheet(HTML) 46 Page - ELAN Microelectronics Corp |
46 / 65 page EM78P813 8-bit OTP Micro-controller __________________________________________________________________________________________________________________________________________________________________ * This specification is subject to change without notice. 46 2004/8/19 (V1.6) If EXLCD equal to 0, internal LCD driver selected . PortB and PortC output are decided on IOC9 and IOCA Page1. When EXLCD equal to 1, PortB and PortC are switch to external LCD driver control pin. At this time, when user execute read or write PORTB instruction, PORTC timing characteristic plot is follow below. PORTB DATA WR(PC2)/ RD(PC3) CS(PC0/PC1) A0(PC4) Taw Tcyc Tcc Tacc Tds Tah Tdh PORTB DATA Toh Fig.31 timing characteristic of external LCD driver data read/write Rated value Symbol Applicable pins Min Max Unit Tah A0 0 Taw A0 0 Tcyc A0 150 Tcc WR/RD 60 Tds D0 ~D7 20 Tdh D0 ~D7 10 Tacc D0 ~D7 - 60 Toh D0 ~D7 10 40 ns Tah : Address hold time Taw : Address setup time Tcyc : System cycle time Tcc : Pulse width Tds : Data setup time Tdh : Data hold time Tacc : Read access time Toh : Output disable time User can operate in coordination on chip Data ROM address automatic increase function to write a large number of data from internal Data ROM to external LCD RAM. Example( To collocate EM9L8580 LCD driver ): START: MOV A , @0x0C; IOW IOC5_PAGE0 ;Set Data ROM address automatic increase after read/write data MOV A , @0x09 IOW IOCB_PAGE1 ;External LCD driver chip 1 INSTRUCTION mode select . MOV A , @0xB0; MOV RB_PAGE0 , A ;Set external LCD driver start address PAGE 0 MOV A , @0x10 MOV RB_PAGE0 , A MOV A , @0x00 |
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