Revidreg (0X0A00 0014) - NEC VR4181 mPD30181 User Manual

6.2.5 REVIDREG (0x0A00 0014)

Bit 15
Name RID3
R/W R
Bit 7
Name Reserved
R/W R
Bit Name
15 to 12 RID(3:0)
11 to 8 MJREV(3:0)
7 to 4 Reserved
3 to 0 MNREV(3:0)
This register is used to indicate the revision of the V
of the V 4181 is as follows.
R
V 4181 Revision
R
1.0
1.1
1.2
1.3
Even if the CPU core or the peripheral unit has been changed, there is no guarantee that REVIDREG register will
be reflected, or that the changes to the revision number necessarily reflect real changes of the CPU core or the
peripheral unit. For this reason, software should not rely on the revision number in REVIDREG register to
characterize the units.
Caution Values of this register bits differ depending on the delivery date.
116
CHAPTER 6 BUS CONTROL
14 13
RID2 RID1
R R
6 5
Reserved Reserved
R R
Processor revision ID (Read Only)
Major revision ID number (Read only)
0 is returned when read
Minor revision ID (Read only)
RID(3:0) MJREV(3:0)
0x0 0x0
0x0 0x0
0x0 0x0
0x0 0x0
User's Manual U14272EJ3V0UM
12 11
RID0 MJREV3 MJREV2
R R
4 3
Reserved MNREV3 MNREV2
R R
Function
4181. The relationship between the values and the revision
R
MINREV(3:0)
0x0
0x1
0x2
0x2
10 9
MJREV1 MJREV0
R R
2 1
MNREV1 MNREV0
R R
8
R
0
R