MC80F7708 - abov.co.kr

MC80F7708routine at the execution of a subroutine call instruction orthe acceptance of an interrupt.When returning from the processing routine, executing thesubroutine return instruction [RET] restores the contents ofthe program counter from the stack; executing the interruptreturn instruction [RETI] restores the contents of the programcounter and flags.The save/restore locations in the stack are determined bythe stack pointer (SP). The SP is automatically decreasedafter the saving, and increased before the restoring. Thismeans the value of the SP indicates the stack locationnumber for the next save. Refer to Figure 8-4 on page 23.LCD Display MemoryLCD display data area is handled in LCD section.See "18.3 LCD Display Memory" on page 80.Address Register Name Symbol R/WInitial Value7 6 5 4 3 2 1 0AddressingMode00A0H R0 Open Drain Control Register R0OD W 0 0 - 0 - - 0 - byte 100A1H R1 Open Drain Control Register R1OD W - - - - - - - 0 byte00A2H R2Open Drain Control Register R2OD W - -000000 byte00A4H R4Open Drain Control Register R4OD W - 0 0 0 0 0 0 - byte00A5H R0 Pull-up Register R0PU W 0 0 - 0 0 0 0 - byte00A6H R1 Pull-up Register R1PU W - - - - - - - 0 byte00A7H R2 Pull-up Register R2PU W - -000000 byte00A9H R4 Pull-up Register R2PU W 0000000- byte00AAH Port Selection Register 0 PSR0 W 0 0 - 0 0 0 0 - byte00ABH Port Selection Register 1 PSR1 W - - - - - - - 0 byte00ACH R5 Port Selection Register R5PSR R / W 11111111 byte, bit 200ADH R6 Port Selection Register R6PSR R / W 11111111 byte, bit00AEH R7 Port Selection Register R7PSR R / W 11111111 byte, bit00B0H R7 Data Register R7 R / W 00000000 byte00B2H LCD Control Register LCR R / W 00000000 byte, bit00B3H LCD BIAS Control Register LBCR R / W 01111000 byte, bit00B4H R7 Direction Register R7IO W 00000000 byte00B8H Asynchronous Serial Mode Register0 ASIMR0 R / W 0000-00- byte, bit00B9H Asynchronous Serial Status Register0 ASISR0 R - - - - - 0 0 0 byte00BAH Baud Rate Generator Control Register0 BRGCR0 R / W -0010000 byte, bit00BBHReceive Buffer Register0 RXBR0 R 00000000 byteTransmit Shift Register0 TXSR0 W 11111111 byte00C0H R0 port data register R0 R / W 0 0 - 0 - - 0 - byte, bit00C1H R0 Direction Register R0IO W 0 0 - 0 - - 0 - byte00C2H R1 port data register R1 R / W - - - - - - - 0 byte, bit00C3H R1 Direction Register R1IO W - - - - - - - 0 byte00C4H R2 port data register R2 R / W - -000000 byte, bit00C5H R2 Direction Register R2IO W - -000000 byte00C8H R4 port data register R2 R / W - 0 0 0 0 0 0 - byte, bitTable 8-1 Control Registers28 December 3, 2012 Ver 1.21