NXP Semiconductors PXN2020 - 26.5.2.53 Receive FIFO Watermark and Selection Register (RFWMSR); 26.5.2.54 Receive FIFO Start Index Register (RFSIR)

FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
26-58 Freescale Semiconductor
26.5.2.53 Receive FIFO Watermark and Selection Register (RFWMSR)
This register is used to
• select a receiver FIFO for subsequent programming access through the receiver FIFO
configuration registers summarized in Table 26-62.
• to define the watermark for the selected FIFO.
26.5.2.54 Receive FIFO Start Index Register (RFSIR)
This register defines the message buffer header index of the first message buffer of the selected FIFO.
Base + 0x0086 Write: WM
A
/WM
B
: POC:config, SEL: Anytime
0123456789101112131415
R
WM
A/
/WM
B
0000000
SEL
W
Reset0000000000000000
Figure 26-54. Receive FIFO Watermark and Selection Register (RFWMSR)
Table 26-62. SEL Controlled Receiver FIFO Registers
Register
Receive FIFO Start Index Register (RFSIR)
Receive FIFO Depth and Size Register (RFDSR)
Receive FIFO Message ID Acceptance Filter Value Register (RFMIDAFVR)
Receive FIFO Message ID Acceptance Filter Mask Register (RFMIAFMR)
Receive FIFO Frame ID Rejection Filter Value Register (RFFIDRFVR)
Receive FIFO Frame ID Rejection Filter Mask Register (RFFIDRFMR)
Receive FIFO Range Filter Configuration Register (RFRFCFR)
Receive FIFO Range Filter Control Register (RFRFCTR)
Table 26-63. RFSR Field Descriptions
Field Description
WM
A
WM
B
Watermark — This field defines the watermark value for the selected FIFO. This value is used to control the
generation of the almost full interrupt flags.
SEL Select — This control bit selects the receiver FIFO for subsequent programming.
0 Receiver FIFO for channel A selected.
1 Receiver FIFO for channel B selected.
Base + 0x0088 Write: POC:config
0123456789101112131415
R000000
SIDX
A
/SIDX
B
W
Reset0000000000000000
Figure 26-55. Receive FIFO Start Index Register (RFSIR)