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FlexRay Module Registers

26.3.2.3.7 MHD Configuration Register (MHDC)

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

state only.

Figure 26-134 and Table 26-119 illustrate this register.

Figure 26-134. MHD Configuration Register (MHDC) [offset_CC = 98h]

31 29 28 16

Reserved SLT*

R-0 R/W-2h

15 7 6 0

Reserved SFDL*

R-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 26-119. MHD Configuration Register (MHDC) Field Descriptions

Bit Field Value Description

31-29 Reserved 0 Read returns 0. Writes have no effect.

28-16 SLT 0-1F2Dh Start of latest transmit (in minislots). These bits configure the maximum minislot value allowed

minislots before inhibiting new frame transmissions in the Dynamic Segment of the cycle. There is no

transmission in dynamic segment if SLT is set to zero.

15-8 Reserved 0 Read returns 0. Writes have no effect.

7-0 SFDL 0-7Fh Static frame data length. These bits configure the cluster-wide payload length for all frames sent

in the static segment in double bytes. The payload length must be identical in all nodes of a

cluster.

1309

SPNU563–May 2014 FlexRay Module

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