Datasheet

Port Integration Module (S12XSPIMV1)

S12XS Family Reference Manual, Rev. 1.13

80 Freescale Semiconductor

2.3.11 Ports ABEK Reduced Drive Register (RDRIV)

This register is used to select reduced drive for the pins associated with ports A, B, E, and K. If enabled,

the pins drive at approx. 1/5 of the full drive strength.

PUPBE

Port B Pull-up Enable—Enable pull-up devices on all port input pins

This bit conﬁgures whether a pull-up device is activated on all associated port input pins. If a pin is used as output

this bit has no effect.

1 Pull-up device enabled

0 Pull-up device disabled

PUPAE

Port A Pull-up Enable—Enable pull-up devices on all port input pins

This bit conﬁgures whether a pull-up device is activated on all associated port input pins. If a pin is used as output

this bit has no effect.

1 Pull-up device enabled

0 Pull-up device disabled

Address 0x000D (PRR) Access: User read/write

Read: Anytime, the data source depends on the data direction value

Write: Anytime

76543210

RDPK

RDPE

RDPB RDPA

Reset 00000000

= Unimplemented or Reserved

Figure 2-9. Ports ABEK Reduced Drive Register (RDRIV)

Table 2-11. RDRIV Register Field Descriptions

Field Description

RDPK

Port K reduced drive—Select reduced drive for output port

This bit conﬁgures the drive strength of all associated port output pins as either full or reduced. If a pin is used as

input this bit has no effect. The reduced drive function is independent of which function is being used on a particular

pin.

1 Reduced drive selected (approx. 1/5 of the full drive strength)

0 Full drive strength enabled