pull_up.dt

台湾义隆（EM78P222N）,DATASHEET.

;Defined registers
PHCR      == 0XD
;
IOC5      == 0X5
IOC6      == 0X6          
          ORG       0X0
          NOP
          JMP       RESET             ;Power on reset
          ;
RESET:
          NOP
          CALL      SET_222_PULLUP    ; Initial 222
          NOP
MAIN:
          NOP
          JMP        $
          ;
SET_222_PULLUP:
          BANK       1
          MOV        A, @0X0F
          MOV        IOC5, A          ; Set P5.0~3 as input
          MOV        A, @0XF0
          MOV        IOC6, A          ; Set P6.4~7 as input
          MOV        A, @0
          MOV        PHCR, A          ; Set P5.0~3,P6.4~7 pull high
          RET
          ;
          END