MC95FR464_DS_REV2.0_20120104.pdf - ABOV Semiconductor

MC95FR332/432/364/464P37BPC P36BPC P35BPC P34BPC P33BPC P32BPC P31BPC P30BPCR/W R/W R/W R/W R/W R/W R/W R/WInitial value : FF HP3BPC[7:0]Controls port direction and use of internal pull-up resistor whenexternal VDD drops below BODOUT0 level.0 Maintain its previous state (input or output)1 Changed to input port and pull-up resistor is activated9.2.12 PORT 4P4 (P4 Data Register)A3 H7 6 5 4 3 2 1 0P47 P46 P45 P44 P43 P42 P41 P40R/W R/W R/W R/W R/W R/W R/W R/WInitial value : 00 HP4[7:0]I/O DataP4IO (P4 Direction Register)A4 H7 6 5 4 3 2 1 0P47IO P46IO P45IO P44IO P43IO P42IO P41IO P40IOR/W R/W R/W R/W R/W R/W R/W R/WInitial value : 00 HP4IO[7:0]P4 Direction0 Input1 OutputP4PU (P4 Pull-up Resistor Selection Register)A4 H7 6 5 4 3 2 1 0P47PU P46PU P45PU P44PU P43PU P42PU P41PU P40PUR/W R/W R/W R/W R/W R/W R/W R/WInitial value : FF HP4PU[7:0]P4 Pull-up Control0 Disable pull-up1 Enable pull-upP4OD (P4 Open-drain Selection Register)A6 H7 6 5 4 3 2 1 0P47OD P46OD P45OD P44OD P43OD P42OD P41OD P40ODR/W R/W R/W R/W R/W R/W R/W R/WInitial value : 00 HP4OD[7:0]Controls P0 port type when configured as output port.0 Push-pull type output drive1 Open-drain type output drive46 January, 2012 Rev.2.0