Datasheet

TJA1085 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 23 October 2012 21 of 61
NXP Semiconductors
TJA1085
FlexRay active star coupler
The assignment of control and status register addresses is detailed in Table 6. Data can
only be written to the Control and Configuration registers (status registers are read-only
by definition). Therefore the state of bit 12 is only evaluated when these registers are
being accessed.
[1] Bit 12 is assumed to be 1 for status registers
The following subsections provide details of the bits in these registers and the control and
status functionality assigned to each.
Table 6. Register map
Address bits 15, 14 and 13 Write access bit 12
[1]
Register
000 0 =R/W, 1 = R/O Control register; see Table 7
001 1 = R/O Interrupt status register; see Table 9
010 1 = R/O General status register; see Table 10
011 1 = R/O Branch 1 status register; see Table 11
100 1 = R/O Branch 2 status register; see Table 11
101 1 = R/O Branch 3 status register; see Table 11
110 1 = R/O Branch 4 status register; see Table 11
111 0 =R/W, 1 = R/O Configuration register; see Table 8