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FlexRay Module Registers

26.3.2.4.11 Odd Sync ID Registers (OSID[1-15])

Registers OSID1 to OSID15 hold the frame IDs of the sync frames received in odd communication cycles,

assorted in ascending order, with register OSID1 holding the lowest received sync frame ID. If the node

transmits a sync frame in an odd communication cycle by itself, register OSID1 holds the respective sync

frame ID as configured in message buffer 0. The value is updated during the NIT of each odd

communication cycle. This register is reset when the Communication Controller leaves CONFIG state or

enters STARTUP state.

Figure 26-156 and Table 26-141 illustrate this register.

Figure 26-156. Odd Sync ID Registers (OSIDn) [offset_CC = 170h-1A8h]

31 16

Reserved

R-0

15 14 13 10 9 0

RXOB RXOA Reserved OID

R-0 R-0 R-0 R-0

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Table 26-141. Odd Sync ID Registers (OSIDn) Field Descriptions

Bit Field Value Description

31-16 Reserved 0 Read returns 0. Writes have no effect.

15 RXOB Received odd sync ID on channel B. A sync frame corresponding to the stored even sync ID was

received on channel B.

0 Sync frame not received on channel B

1 Sync frame received on channel B

14 RXOA Received odd sync ID on channel A. A sync frame corresponding to the stored even sync ID was

received on channel A.

0 Sync frame not received on channel A

1 Sync frame received on channel A

13-10 Reserved 0 Read returns 0. Writes have no effect.

9-0 OID Odd Sync ID. Sync frame ID odd communication cycle.

1327

SPNU563–May 2014 FlexRay Module

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