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EM78P813BQ Datasheet(PDF) 45 Page - ELAN Microelectronics Corp |
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EM78P813BQ Datasheet(HTML) 45 Page - ELAN Microelectronics Corp |
45 / 65 page EM78P813 8-bit OTP Micro-controller __________________________________________________________________________________________________________________________________________________________________ * This specification is subject to change without notice. 45 2004/8/19 (V1.6) PAGE1 Port B IO/SEG Control Register 7 6 5 4 3 2 1 0 PBS7 PBS6 PBS5 PBS4 PBS3 PBS2 PBS1 PBS0 Bit 0~Bit 7 (PBS0~PBS7) : Switch I/O PORTB or LCD segment(com) output for share pins COMxx/SEGxx/PORTB pins 0 select normal PORTB I/O 1 select output for LCD COM/SEGMENT output. IOCA Stack point , Port C IO/SEG Control PAGE0 STACK Point 7 6 5 4 3 2 1 0 - - - STKP4 STKP3 STKP2 STKP1 STKP0 Bit 0 ~ Bit 5 (STKP0 ~ STKP4) : Stack Point selection bits Stack4 STKP3 STKP2 STKP1 STKP0 Stack Point 0 0 0 0 0 Stack 1 0 0 0 0 1 Stack 2 0 0 0 1 0 Stack 3 0 0 0 1 1 Stack 4 : : : : : : : : : : : : 1 0 1 1 0 Stack 22 1 0 1 1 1 Stack 23 1 1 0 0 0 Stack 24 User can read bit 5 .. bit 0 to understand how many stack layer that program used . Bit 4 .. bit 0 is a six bit counter. The counter will incrementally after user use internal , external interrupt or “CALL” instruction and it will decrement when user use “RET” or “RETI” instruction. These five bits are read only bits. Bit 5~Bit 7 : Unused PAGE1 Port C IO/SEG Control Register 7 6 5 4 3 2 1 0 PCS7 PCS6 PCS5 PCS4 PCS3 PCS2 PCS1 PCS0 Bit 0~Bit 7 (PCS0~PCS7) : Switch I/O PORTC or LCD segment(com) output for share pins COMxx/SEGxx/PORTC pins 0 select normal PORTC I/O 1 select output for LCD COM/SEGMENT output. IOCB PORT B I/O Control ,External LCD driver interface (for EMC 65x132) PAGE0 PORT B I/O Control 7 6 5 4 3 2 1 0 IOCB7 IOCB6 IOCB5 IOCB4 IOCB3 IOCB2 IOCB1 IOCB0 Bit 0~Bit 7 (IOCB0~IOCB7) : PORTB(0~7) I/O direction control register 0 put the relative I/O pin as output 1 put the relative I/O pin into high impedance PAGE1 External LCD Driver controller 7 6 5 4 3 2 1 0 EXA17 CWPWR RES1 RSE0 CSS CSSON DIS EXLCD Bit 0(EXLCD) : Internal/External LCD driver switch. 0/1 Internal only/Internal and External LCD driver control |
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