MC80F7708 - abov.co.kr

MC80F7708R4 Data RegisterR4ADDRESS : 0C8 HRESET VALUE : -000000- BR47 R46 R45 R44 R43 R42 R41 -R4 Direction RegisterR4IOR4 Pull-upSelection RegisterR4PUR4 Open DrainSelection RegisterR0ODADDRESS : 0C9 HRESET VALUE : -000000- BPort Direction0: Input1: OutputADDRESS :0A9 HRESET VALUE : 0000000- BPull-up select0: Without pull-up1: With pull-upADDRESS :0A4 HRESET VALUE : -000000- B- -Open Drain select0: No Open Drain1: Open DrainPortSelection Register 1PSR1LCR-ADDRESS :0AB HRESET VALUE : -----000 B- - - - - INT3I INT2IINT2I (External Interrupt 2)0: R41Port1: INT2INT3I (External Interrupt 3)0: R41Port1: INT3LCD Control RegisterPWM1O (PWM1 Output)0: R10 Port1: PWM1/T2OIn addition, Port R4 is multiplexed with oscillation input/output, reset and interrupt input pins. The control registerPSR1 (address 0AB H ) controls the selection of alternatefunction. After reset, this value is “0”, port may be used asnormal I/O port. To use alternate function such as ExternalInterrupt rather than normal I/O, write “1” in the correspondingbit of PSR1.Main oscillation input/output and reset pin can be used asnormal I/O ports (R43/R42) and normal input port(R47) byselecting configuration options in flash writing. Sub oscillationinput/output pin can be used as normal I/O ports bywriting “1” to the SCKD bit of the LCR register--PWM1OADDRESS :0B2 HRESET VALUE : 00000000 BSCKD 1 LCDEN 0 1 LCDD0 LCK1SCKD (Sub Clock Disable)0: Sub Clock Oscillation Eaable (SXIN/SXOUT)1: Sub Clock Oscillation Disable (R45/R46)LCK0Port PinR41R42R43R44R45R46R47Alternate FunctionINT2 (External Interrupt 2)X OUT (Oscillation Output)X IN (Oscillation Input)INT3 (External Interrupt 3)SX IN (Subsystem Oscillation Input)SX OUT (Subsystem Oscillation Output)RESET (System Reset Input)Note: R4IO, R4PU, P4OD and PSR1 are write-only registers.They can not be read and can not be accessed by bitmanipulation instruction. Do not use read or read-modifywriteinstruction. Use byte manipulation instruction.R5 PortsR5 is an 8-bit CMOS bidirectional I/O port (address0CA H ). Each I/O pin can independently used as an input oran output through the R5IO register (address 0CB H ).R5 is multiplexed with LCD segment output(SEG0 ~SEG7), which can be selected by writing appropriate valueinto the R5PSR(address 0AC H ).R50, R1, R52 is also multiplxed with RX0, TX0 and ACK,which can be selected by writing appropriate value into theASIMR0(address 0B8 H ).R5 Data RegisterR5R5 Direction RegisterR5IOADDRESS: 0CA HRESET VALUE: 00000000 BR57 R56 R55 R54 R53 R52 R51 R50R5/LCD PortSelection RegisterR5PSRADDRESS : 0CB HRESET VALUE : 00000000 BPort Direction0: Input1: OutputADDRESS : 0AC HRESET VALUE : 11111111 BR5PS7 R5PS6 R5PS5 R5PS4 R5PS3 R5PS2 R5PS1 R5PS00: Seg Selection(seg7~seg0)1: Port SelectionNote: R5IO is write-only register. It can not be read andcan not be accessed by bit manipulation instruction. Do notuse read or read-modify-write instruction. Use byte manipulationinstruction.38 December 3, 2012 Ver 1.21