Freescale Semiconductor FlexRay MFR4310 - Figure 3-42. Slot Status Counter Condition Register (SSCCR); Table 3-50. SSSR Field Descriptions; Table 3-51. Mapping between Sssrn and Ssrn

FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 2
Freescale Semiconductor 109
3.3.2.43 Slot Status Counter Condition Register (SSCCR)
This register is used to access and program the four internal non-memory mapped Slot Status Counter
Condition Registers SSCCR0 to SSCCR3. Each of these four internal slot status counter condition
registers defines the mode and the conditions for incrementing the counter in the corresponding Slot Status
Counter Registers (SSCR0–SSCR3). The correspondence is given in Table 3-53. For a detailed description
of slot status counters, refer to Section 3.4.18.4, “Slot Status Counter Registers”.
Table 3-50. SSSR Field Descriptions
Field Description
15
WMD
Write Mode — This control bit defines the write mode of this register.
0 Write to all fields in this register on write access.
1 Write to SEL field only on write access.
13–12
SEL
Selector — This field selects one of the four internal slot status selection registers for access.
00 select SSSR0.
01 select SSSR1.
10 select SSSR2.
11 select SSSR3.
10–0
SLOTNUMBER
Slot Number — This field specifies the number of the slot whose status is saved in the corresponding slot
status registers.
Note: If this value is set to 0, the related slot status register provides the status of the symbol window after the
NIT start, and provides the status of the NIT after the cycle start.
Table 3-51. Mapping Between SSSRn and SSRn
Internal Slot
Status Selection
Register
Write the Slot Status of the Slot Selected by SSSRn for each
Even Communication Cycle Odd Communication Cycle
For Channel B
to
For Channel A
to
For Channel B
to
For Channel A
to
SSSR0 SSR0[15:8] SSR0[7:0] SSR1[15:8] SSR1[7:0]
SSSR1 SSR2[15:8] SSR2[7:0] SSR3[15:8] SSR3[7:0]
SSSR2 SSR4[15:8] SSR4[7:0] SSR5[15:8] SSR5[7:0]
SSSR3 SSR6[15:8] SSR6[7:0] SSR7[15:8] SSR7[7:0]
0x0066 16-bit write access required Write: Any Time
1514131211109876543210
R0 0
SEL
0
CNTCFG MCY VFR SYF NUF SUF STATUSMASK
WWMD
Reset0000000000000000
Figure 3-42. Slot Status Counter Condition Register (SSCCR)