Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual de usuario descargar pdf (Pagina 43)

MAXQ Family User’s Guide:

MAXQ2010 Supplement

6-5

6.1.3 Port 2 Direction Register (PD2, M0[12h])

Each of the bits in this register controls the input/output direction of a port pin (P2.0 to P2.7) as follows:

0 = The port pin is in input mode, either with a weak pullup (if PO = 1) or three-stated (if PO = 0).

1 = The port pin is in output mode, with the output level to drive given by PO.

6.1.4 Port 3 Direction Register (PD3, M0[13h])

Each of the bits in this register controls the input/output direction of a port pin (P3.0 to P3.7) as follows:

0 = The port pin is in input mode, either with a weak pullup (if PO = 1) or three-stated (if PO = 0).

1 = The port pin is in output mode, with the output level to drive given by PO.

6.1.5 Port 4 Direction Register (PD4, M1[10h])

Each of the bits in this register controls the input/output direction of a port pin (P4.0 to P4.7) as follows:

0 = The port pin is in input mode, either with a weak pullup (if PO = 1) or three-stated (if PO = 0).

1 = The port pin is in output mode, with the output level to drive given by PO.

Bit #

7 6 5 4 3 2 1 0

Name PD2

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

Bit #

7 6 5 4 3 2 1 0

Name PD3

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

Bit #

7 6 5 4 3 2 1 0

Name PD4

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 146 147

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Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual de usuario Pagina 43