NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 489 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
SC Control Register (SC_CTL)
Register
Offset
R/W
Description
Reset Value
SC_CTL
x=0,1
0x004
R/W
SC Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
SYNC
Reserved
CDLV
CDDBSEL
23
22
21
20
19
18
17
16
TXRTYEN
TXRTY
RXRTYEN
RXRTY
15
14
13
12
11
10
9
8
NSB
TMRSEL
BGT
7
6
5
4
3
2
1
0
RXTRGLV
CONSEL
AUTOCEN
TXOFF
RXOFF
SCEN
Bits
Description
[31]
Reserved
Reserved.
[30]
SYNC
SYNC Flag Indicator
Due to synchronization, software should check this bit before writing a new value to
RXRTY and TXRTY.
0 = Synchronizing is completion, user can write new data to RXRTY and TXRTY.
1 = Last value is synchronizing.
Note:
This bit is read only.
[29:27]
Reserved
Reserved.
[26]
CDLV
Card Detect Level
0 = When hardware detects the card detect pin (SC_CD) from high to low, it indicates a
card is detected.
1 = When hardware detects the card detect pin from low to high, it indicates a card is
detected.
Note:
Software must select card detect level before Smart Card engine enabled.
[25:24]
CDDBSEL
Card Detect De-bounce Selection
This field indicates the card detect de-bounce selection.
00 = De-bounce sample card insert once per 384 (128 * 3) peripheral clocks and de-
bounce sample card removal once per 128 peripheral clocks.
01 = De-bounce sample card insert once per 192 (64 * 3) peripheral clocks and de-bounce
sample card removal once per 64 peripheral clocks.
10 = De-bounce sample card insert once per 96 (32 * 3) peripheral clocks and de-bounce
sample card removal once per 32 peripheral clocks.
11 = De-bounce sample card insert once per 48 (16 * 3) peripheral clocks and de-bounce
sample card removal once per 16 peripheral clocks.
[23]
TXRTYEN
TX Error Retry Enable Bit
This bit enables transmitter retry function when parity error has occurred.