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PROGRAMMER'S MODEL ARM920T PROCESSOR
2-10
Table 2-9 shows the meaning of values used for line length encoding
Table 2-9. Line Length Encoding
Bits [13:12]/Bits [1:0] Words Per Line
00 2
01 4
10 8
11 16
REGISTER 1: CONTROL REGISTER
This register contains the control bits of the ARM920T. All reserved bits should either be written with zero or one, as
indicated, or written using read-modify-write. The reserved bits have an unpredictable value when read. To read and
write this register:
MRC p15, 0, Rd, c1, c0, 0; read control register
MCR p15, 0, Rd, c1, c0, 0; write control register
All defined control bits are set to zero on reset except the V-Bit which is set to zero at reset if the VINITHI pin is
LOW, or one if the VINITHI pin is HIGH. The functions of the control bits are shown in Table 2-10.