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FlexRay Module Registers

26.3.2.3.10 GTU Configuration Register 3 (GTUC3)

The communication controller accepts modifications of the register in DEFAULT_CONFIG or CONFIG

state only.

Figure 26-137 and Table 26-122 illustrate this register.

Figure 26-137. GTU Configuration Register 3 (GTUC3) [offset_CC = A8h]

31 30 24 23 22 16

Rsvd MIOB* Rsvd MIOA*

R-0 R/W-2h R-0 R/W-2h

15 8 7 0

UIOB* UIOA*

R/W-0 R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset; *These bits can be updated in DEFAULT_CONFIG or CONFIG state

only.

Table 26-122. GTU Configuration Register 3 (GTUC3) Field Descriptions

Bit Field Value Description

31 Reserved 0 Read returns 0. Writes have no effect.

30-24 MIOB 2h-48h MT Macrotick initial offset channel B (in macroticks). These bits configure the number of macroticks

between the static slot boundary and the subsequent macrotick boundary of the secondary time

reference point based on the nominal macrotick duration. Must be identical in all nodes of a

cluster.

23 Reserved 0 Read returns 0. Writes have no effect.

22-16 MIOA 2h-48h MT Macrotick initial offset channel A (in macroticks). These bits configure the number of macroticks

between the static slot boundary and the subsequent macrotick boundary of the secondary time

reference point based on the nominal macrotick duration. Must be identical in all nodes of a

cluster.

15-8 UIOB 0-F0h µT Microtick initial offset channel B (in microticks). These bits configure the number of microticks

between the actual time reference point on channel B and the subsequent macrotick boundary of

the secondary time reference point. The parameter has to be set for each channel independently.

7-0 UIOA 0-F0h µT Microtick initial offset channel A (in microticks). These bits configure the number of microticks

between the actual time reference point on channel A and the subsequent macrotick boundary of

the secondary time reference point. The parameter has to be set for each channel independently.

1311

SPNU563–May 2014 FlexRay Module

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