MC9S08DZ96F2CLL datasheet(118/458 Pages) FREESCALE

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Chapter 6 Parallel Input/Output Control

MC9S08DZ128 Series Data Sheet, Rev. 1

118

Freescale Semiconductor

6.5.4.5

Port D Drive Strength Selection Register (PTDDS)

6.5.4.6

Port D Interrupt Status and Control Register (PTDSC)

76543210

PTDDS7

PTDDS6

PTDDS5

PTDDS4

PTDDS3

PTDDS2

PTDDS1

PTDDS0

Reset:

00000000

Figure 6-28. Drive Strength Selection for Port D Register (PTDDS)

Table 6-26. PTDDS Register Field Descriptions

Field

Description

7:0

PTDDS[7:0]

Output Drive Strength Selection for Port D Bits — Each of these control bits selects between low and high

output drive for the associated PTD pin. For port D pins that are conﬁgured as inputs, these bits have no effect.

0 Low output drive strength selected for port D bit n.

1 High output drive strength selected for port D bit n.

76543210

0000

PTDIF

PTDIE

PTDMOD

PTDACK

Reset:

00000000

= Unimplemented or Reserved

Figure 6-29. Port D Interrupt Status and Control Register (PTDSC)

Table 6-27. PTDSC Register Field Descriptions

Field

Description

PTDIF

Port D Interrupt Flag — PTDIF indicates when a port D interrupt is detected. Writes have no effect on PTDIF.

0 No port D interrupt detected.

1 Port D interrupt detected.

PTDACK

Port D Interrupt Acknowledge — Writing a 1 to PTDACK is part of the ﬂag clearing mechanism. PTDACK

always reads as 0.

PTDIE

Port D Interrupt Enable — PTDIE determines whether a port D interrupt is requested.

0 Port D interrupt request not enabled.

1 Port D interrupt request enabled.

PTDMOD

Port D Detection Mode — PTDMOD (along with the PTDES bits) controls the detection mode of the port D

interrupt pins.

0 Port D pins detect edges only.

1 Port D pins detect both edges and levels.

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