HCS08 datasheet(87/316 Pages) NXP

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Chapter 6 Parallel Input/Output Control

MC9S08SG8 MCU Series Data Sheet, Rev. 8

Freescale Semiconductor

6.6.2.7

Port B Interrupt Pin Select Register (PTBPS)

6.6.2.8

Port B Interrupt Edge Select Register (PTBES)

321

000

PTBPS3

PTBPS2

PTBPS1

PTBPS0

Reset:

000

Figure 6-17. Port B Interrupt Pin Select Register (PTBPS)

Table 6-16. PTBPS Register Field Descriptions

Field

Description

3:0

PTBPS[3:0]

Port B Interrupt Pin Selects — Each of the PTBPSn bits enable the corresponding port B interrupt pin.

0 Pin not enabled as interrupt.

1 Pin enabled as interrupt.

321

000

PTBES3

PTBES2

PTBES1

PTBES0

Reset:

000

Figure 6-18. Port B Edge Select Register (PTBES)

Table 6-17. PTBES Register Field Descriptions

Field

Description

3:0

PTBES[3:0]

Port B Edge Selects — Each of the PTBESn bits serves a dual purpose by selecting the polarity of the active

interrupt edge as well as selecting a pull-up or pull-down device if enabled.

0 A pull-up device is connected to the associated pin and detects falling edge/low level for interrupt generation.

1 A pull-down device is connected to the associated pin and detects rising edge/high level for interrupt

generation.

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