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PCF8564A Datasheet(PDF) 49 Page - NXP Semiconductors

Part # PCF8564A
Description  Nano-power highly accurate RTC with integrated quartz crystal for automotive applications
PDF  86 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8564A Datasheet(HTML) 49 Page - NXP Semiconductors

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NXP Semiconductors
PCA2131
Nano-power highly accurate RTC with integrated quartz crystal for automotive applications
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.
PCA2131
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 1.0 — 26 July 2021
49 / 86



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