PXS20RM Datasheet, PDF (776/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexRay Communication Controller
Field
PTD
Table 26-62. FR_RFPTR Field Descriptions
Description
Periodic Timer Duration — This value defines the periodic timer duration in terms of macroticks.
0000 timer stays expired
3FFF timer never expires
other timer expires after specified number of macroticks, expires and is restarted at each cycle start
26.5.2.55 Receive FIFO Watermark and Selection Register (FR_RFWMSR)
Base + 0x0086
Write: WM_A/WM_B: POC:config, SEL: Anytime
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
WM_A//WM_B
W
0000000
SEL
Rese
t
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 26-56. Receive FIFO Watermark and Selection Register (FR_RFWMSR)
This register is used to
• select a receiver FIFO for subsequent programming access through the receiver FIFO
configuration registers summarized in Table 26-63.
• to define the watermark for the selected FIFO.
Table 26-63. SEL Controlled Receiver FIFO Registers
Register
Receive FIFO Start Index Register (FR_RFSIR)
Receive FIFO Depth and Size Register (RFDSR)
Receive FIFO Message ID Acceptance Filter Value Register (FR_RFMIDAFVR)
Receive FIFO Message ID Acceptance Filter Mask Register (FR_RFMIDAFMR)
Receive FIFO Frame ID Rejection Filter Value Register (FR_RFFIDRFVR)
Receive FIFO Frame ID Rejection Filter Mask Register (FR_RFFIDRFMR)
Receive FIFO Range Filter Configuration Register (FR_RFRFCFR)
Receive FIFO Range Filter Control Register (FR_RFRFCTR)
Field
WM_A
WM_B
SEL
Table 26-64. FR_RFWMSR Field Descriptions
Description
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.
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
26-64
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor