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FlexRay Module Registers
1405
SPNU563A–March 2018
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FlexRay Module
26.3.2.8.5 Input Buffer Command Mask Register (IBCM)
Configures how the message buffer in the message RAM selected by the input buffer command request
register is updated. When IBF host and IBF shadow are swapped, also mask bits LHSH, LDSH, and
STXRH are swapped with bits LHSS, LDSS, and STXRS to keep them attached to the respective input
buffer transfer.
Figure 26-184 and Table 26-157 illustrate this register.
Figure 26-184. Input Buffer Command Mask Register (IBCM) [offset_CC = 510h]
31 19 18 17 16
Reserved STXRS LDSS LHSS
R-0 R-0 R-0 R-0
15 3 2 1 0
Reserved STXRH LDSH LHSH
R-0 R/W-0 R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 26-157. Input Buffer Command Mask Register (IBCM) Field Descriptions
Bit Field Value Description
31-19 Reserved 0 Reads return 0. Writes have no effect.
18 STXRS Set transmission request shadow.
0 Reset TXR flag.
1 Set TXR flag; transmit buffer is released for transmission (operation ongoing or finished).
17 LDSS Load data section shadow.
0 Data section is not updated.
1 Data section is selected for transfer from input buffer to the message RAM (transfer ongoing or
finished).
16 LHSS Load header section shadow.
0 Header section is not updated.
1 Header section is selected for transfer from input buffer to the message RAM (transfer ongoing or
finished).
15-3 Reserved 0 Reads return 0. Writes have no effect.
2 STXRH Set transmission request host. If this bit is set to 1, the transmission request flag TXR for the selected
message buffer is set in the transmission request registers to release the message buffer for
transmission. In single-shot mode the flag is cleared by the communication controller after transmission
has completed. The flags is evaluated for transmit buffers only.
0 Reset transmission request flag.
1 Set transmission request flag; transmit buffer is released for transmission.
1 LDSH Load data section host.
0 Data section is not updated.
1 Data section is selected for transfer from input buffer to the message RAM.
0 LHSH Load header section host.
0 Header section is not updated.
1 Header section is selected for transfer from input buffer to the message RAM.
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