PC912XDP512F0MPVR datasheet(191/1348 Pages) FREESCALE

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Chapter 6 XGATE (S12XGATEV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

191

XGSS

XGATE Single Step — This bit forces the execution of a single instruction if the XGATE is in DEBUG Mode and

no software error has occurred (XGSWEIF cleared).

Read:

0 No single step in progress

1 Single step in progress

Write

0 No effect

1 Execute a single RISC instruction

Note: Invoking a Single Step will cause the XGATE to temporarily leave Debug Mode until the instruction has

been executed.

XGFACT

Fake XGATE Activity — This bit forces the XGATE to ﬂag activity to the MCU even when it is idle. When it is set

the MCU will never enter system stop mode which assures that peripheral modules will be clocked during XGATE

idle periods

Read:

0 XGATE will only ﬂag activity if it is not idle or in debug mode.

1 XGATE will always signal activity to the MCU.

Write:

0 Only ﬂag activity if not idle or in debug mode.

1 Always signal XGATE activity.

XGSWEIF

XGATE Software Error Interrupt Flag — This bit signals a pending Software Error Interrupt. It is set if the RISC

core detects an error condition (see Section 6.4.5, “Software Error Detection”). The RISC core is stopped while

this bit is set. Clearing this bit will terminate the current thread and cause the XGATE to become idle.

Read:

0 Software Error Interrupt is not pending

1 Software Error Interrupt is pending if XGIE is set

Write:

0 No effect

1 Clears the XGSWEIF bit

XGIE

XGATE Interrupt Enable — This bit acts as a global interrupt enable for the XGATE module

Read:

0 All XGATE interrupts disabled

1 All XGATE interrupts enabled

Write:

0 Disable all XGATE interrupts

1 Enable all XGATE interrupts

Table 6-1. XGMCTL Field Descriptions (Sheet 3 of 3)

Field

Description

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