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MAXQ7667 User’s Guide
5.2.9 Port 0 Direction Register (PD0)
Register Description: Port 0 Direction Register
Register Name: PD0
Register Address: Module 00h, Index 10h
Bits 15 to 8: Reserved.
Read returns 0, write ignored.
Bits 7 to 0: Port 0 Direction Register Bits 7:0 (PD0[7:0]). Port 0 is an enhanced Type D I/O port. The PD0 register is used to determine
the direction of each pin that makes up the port. The port pins are independently controlled by their direction bit. When a bit in PD0 is set
to 1, its corresponding pin is enabled as an output. The data value in the respective bit of the PO register will be driven on the pin. When
a bit in PD0 is cleared to 0, its corresponding pin is available as an input, and allows an external signal to drive the pin. Note that each
port pin has weak pullup and pulldown resistors when functioning as an input, which is controlled by the respective PO bit. If the PO bit
is set to 1, this feature is enabled; if the PO bit is cleared to 0, this feature is disabled and the port pin is in high-impedance three-state.
5.2.10 Port 1 Direction Register (PD1)
Register Description: Port 1 Direction Register
Register Name: PD1
Register Address: Module 00h, Index 11h
Bits 15 to 8: Reserved.
Read returns 0, write ignored.
Bits 7 to 0: Port 1 Direction Register Bits 7:0 (PD1[7:0]). Port 1 is an enhanced Type D I/O port. PD1 is used to determine the direc-
tion of each pin that makes up the port. The port pins are independently controlled by their direction bit. When a bit in PD1 is set to 1,
its corresponding pin is used as an output. The data value in the respective bit of the PO register will be driven on the pin. When a bit
in PD1 is cleared to 0, its corresponding pin is available as an input, and allows an external signal to drive the pin. Note that each port
pin has weak pullup and pulldown resistors when functioning as an input, which is controlled by the respective PO bit. If the PO bit is
set to 1, this feature is enabled; if the PO bit is cleared to 0, this feature is disabled and the port pin is in high-impedance three-state.
r = read, w = write
Note: This register is cleared to 00h on all forms of reset.
Bit #
15 14 13 12 11 10 98
Name — — — — — — — —
Reset 0 0 0 0 0 0 0 0
Access r r rrrrrr
Bit #
76543210
Name PD07 PD06 PD05 PD04 PD03 PD02 PD01 PD00
Reset 0 0 0 0 0 0 0 0
Access rw r w rw rw rw rw rw rw
r = read, w = write
Note: This register is cleared to 00h on all forms of reset.
Bit #
15 14 13 12 11 10 98
Name — — — — — — — —
Reset 0 0 0 0 0 0 0 0
Access r r rrrrrr
Bit #
76543210
Name PD17 PD16 PD15 PD14 PD13 PD12 PD11 PD10
Reset 0 0 0 0 0 0 0 0
Access rw r w rw rw rw rw rw rw
(114 paginas)
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