pca2125 NXP Semiconductors, pca2125 Datasheet - Page 9

• Manufacturer Part Number: pca2125
• Description: Spi Real Time Clock / Calendar Semiconductors
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA2125_00
Preliminary data sheet
6.3.1 Control 1 register
6.3.2 Control 2 register
6.3 Control registers
Table 7.
Table 8.
Bit
7
6
5
4
3
2
1 to 0
Bit
7
6
5
2
4
3
1
0
Symbol
ext test
stop
POR
ovrd
12/24
Symbol
MI
SI
MSF
TF
TI/TP
AF
AIE
TIE
Control 1 (address 00
Control 2 (address 01
Value
0
1
0
0
1
0
0
1
0
1
0 0
Value
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Rev. 00.11 — 30 January 2007
Description
normal mode
external clock test mode
Reserved for future use.
RTC source clock runs
RTC divider chain flip-flops are asynchronously set
to logic 0; the RTC clock is stopped (CLKOUT at
32.768, 16.384 or 8.192 kHz is still available)
Reserved for future use.
Power-on reset override facility is disabled; set to
logic 0 for normal operation
Power-on reset override may be enabled
24 hour mode is selected
12 hour mode is selected
Reserved for future use.
Description
Minute interrupt is disabled
Minute interrupt is enabled
Second interrupt is disabled
Second interrupt is enabled
No minute or second interrupt generated
Flag set when minute or second interrupt
generated. Flag must be cleared to clear interrupt.
No countdown timer interrupt generated
Flag set when countdown timer interrupt generated.
Flag must be cleared to clear interrupt.
Interrupt pin follows timer flags
Interrupt pin generates a pulse
No alarm interrupt generated
Flag set when alarm triggered. Flag must be
cleared to clear interrupt.
No interrupt generated from the alarm flag
Interrupt generated when alarm flag set
No interrupt generated from the countdown timer
flag
Interrupt generated when countdown timer flag set
HEX
HEX
) bits description
) bits description
SPI Real time clock / calendar
PCA2125
© NXP B.V. 2007. All rights reserved.
Section
Section 6.9
Section 6.10
Section 6.2.1
Table 15
Section
Section 6.6.1
Section 6.6
Section 6.7.2
Section 6.5.1
Section 6.7.3
Section 6.7
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