PC912XDP512F0MPVR datasheet(192/1348 Pages) FREESCALE

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Chapter 6 XGATE (S12XGATEV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

192

Freescale Semiconductor

6.3.1.2

XGATE Channel ID Register (XGCHID)

The XGATE channel ID register (Figure 6-4) shows the identiﬁer of the XGATE channel that is currently

active. This register will read “$00” if the XGATE module is idle. In debug mode this register can be used

to start and terminate threads (see Section 6.6.1, “Debug Features”).

Read: Anytime

Write: In Debug Mode

6.3.1.3

XGATE Vector Base Address Register (XGVBR)

The vector base address register (Figure 6-5 and Figure 6-6) determines the location of the XGATE vector

block.

Read: Anytime

Write: Only if the module is disabled (XGE = 0) and idle (XGCHID = $00))

76543210

XGCHID[6:0]

Reset

00000000

= Unimplemented or Reserved

Figure 6-4. XGATE Channel ID Register (XGCHID)

Table 6-2. XGCHID Field Descriptions

Field

Description

6–0

XGCHID[6:0]

Request Identiﬁer — ID of the currently active channel

XGVBR[15:1]

Reset

0000000000000

= Unimplemented or Reserved

Figure 6-5. XGATE Vector Base Address Register (XGVBR)

Table 6-3. XGVBR Field Descriptions

Field

Description

15–1

XBVBR[15:1]

Vector Base Address — The XGVBR register holds the start address of the vector block in the XGATE

memory map.

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