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PCF2131 Fiches technique(PDF) 49 Page - NXP Semiconductors

No de pièce PCF2131
Description  Nano-power highly accurate RTC with integrated quartz crystal
PDF  86 Pages
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Fabricant  NXP [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2131 Fiches technique(HTML) 49 Page - NXP Semiconductors

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NXP Semiconductors
PCF2131
Nano-power highly accurate RTC with integrated quartz crystal
7.13.8 Interrupt masks
Bits labeled as T are unused and return 0 when read.
Bit
7
6
5
4
3
2
1
0
Symbol
INT_A/B_MASK1
Reset
value
-
-
1
1
1
1
1
1
Table 80. INT_A/B_MASK1 - interrupt mask 1 register (address 31h/33h) bit allocation
Bits labeled as T are unused and return 0 when read.
Bit
Symbol
Value
Description
7 to 6
T
00
unused
5
MIA/B
1
minute interrupt mask
4
SIA/B
1
second interrupt mask
3
WD_CDA/B
1
watchdog interrupt mask
2
AIEA/B
1
alarm interrupt mask
1
BIEA/B
1
battery flag interrupt mask
0
BLIEA/B
1
battery low flag interrupt mask
Table 81. INT_A/B_MASK1 - interrupt mask 1 register (address 31h/33h) bit description
Bits labeled as T are unused and return 0 when read.
Bit
7
6
5
4
3
2
1
0
Symbol
INT_A/B_MASK2
Reset
value
T
T
T
T
1
1
1
1
Table 82. INT_A/B_MASK2 - interrupt mask 2 register (address 32h/34h) bit allocation
Bits labeled as T are unused and return 0 when read.
Bit
Symbol
Value
Description
7 to 4
T
0000
unused
3
TSIE1A/B
1
time stamp 1 interrupt mask
2
TSIE2A/B
1
time stamp 2 interrupt mask
1
TSIE3A/B
1
time stamp 3 interrupt mask
0
TSIE4A/B
1
time stamp 4 interrupt mask
Table 83. INT_A/B_MASK2 - interrupt mask 2 register (address 32h/34h) bit description
The registers at addresses 31h to 32h are used to configure interrupt source for INTA
pin, and the registers at addresses 33h to 34h are for INTB pin.
All of above interrupts could be masked from either INTA or INTB, with corresponding bit
set to ‘1’, as shown in Figure 17.
PCF2131
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 1.0 — 28 May 2021
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