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NXP Semiconductors
QN902x
User Manual of QN902x
UM10996
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
User Manual
Rev 1.3
— 05 November 2018
72 of 128
interrupts can be read by RTC_STATUS, and can be cleared by writing 1 to the
corresponding bit.
9.3
Register Description
9.3.1
Register Map
The RTC register base address is 0x4000_6000.
Table 46 Timer Register Map
Offset
Name
Description
000h
CR
RTC control register
004h
SR
RTC status register
008h
SEC
RTC second register
00Ch
CORR
RTC correction register
010h
CALIB
RTC calibration register
014h
CNT
RTC counter current value register
9.3.2
Register Description
Table 47 CR
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
R
SVD
C
A
L_E
N
R
SVD
C
A
P_
EDGE_S
EL
C
A
P_
IE
C
A
P_
EN
R
SVD
CFG
C
O
R
R
_E
N
SEC
_IE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
RW
R
RW
RW
RW
R
W1
RW
RW
Bit
Type
Reset
Symbol
Description
31-9
R
0
RSVD
Reserved
8
RW
0
CAL_EN
Calibration of 32k clock accuracy enable. Refer
PPM_VAL.
0 = disable
1 = enable
7
R
0
RSVD
Reserved
6
RW
0
CAP_EDGE_SEL
Input capture active edge selection:
0 = positive edge
1 = negative edge
5
RW
0
CAP_IE
Input capture interrupt enable:
0 = disable
1 = enable
4
RW
0
CAP_EN
Input capture enable
0 = disable