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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 75 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
Power-On Setting Register (SYS_PWRON)
Register
Offset
R/W
Description
Reset Value
SYS_PWRON
0x004 R/W
Power-On Setting Register
0xXXXX_XXXX
31
30
29
28
27
26
25
24
Reserved
DID
23
22
21
20
19
18
17
16
Reserved
TICMOD
USBID
15
14
13
12
11
10
9
8
Reserved
NECCSEL
7
6
5
4
3
2
1
0
NPAGESEL
URDBGON
JTAGON
WDTON
SYSCKSEL
BTSSEL
Bits
Description
[31:28]
Reserved
Reserved.
[27:24]
DID
Device ID (Read Only)
0000 = NUC970.
0010 = NUC972.
1110 = NUC976.
1111 = NUC977.
DID [3] is also used to indicate NAND interface pin out location.
1’b0 = Pin PC[14:0] is used as NAND interface for boot from NAND.
1’b1 = Pin PI[15:1] is used as NAND interface for boot from NAND.
[17]
TICMOD
TIC Mode Enable
0= TIC disabled.
1= TIC enabled.
[16]
USBID
USB ID Pin Status
0= USB port 0 used as a USB device.
1= USB port 0 used as a USB host.
[9:8]
NECCSEL
NAND Flash ECC Type Selection
When pin nRESET transited from low to high, the value of pin PA[9:8] latched to
NECCSEL.
00= NAND Flash ECC type is BCH T12.
01= NAND Flash ECC type is BCH T15.
10= NAND Flash ECC type is BCH T24.
11= Ignore power-on setting.