PCA2125TS/1-T NXP Semiconductors, PCA2125TS/1-T Datasheet - Page 25

• Manufacturer Part Number: PCA2125TS/1-T
• Description: Real Time Clock AUTO RL TME CLCK/CAL
• Manufacturer: NXP Semiconductors

Specifications of PCA2125TS/1-T

• Bus Type: Serial (3-Wire, SPI)
• Package Type: TSSOP
• Operating Supply Voltage (max): 5.5V
• Operating Temperature (min): -40C
• Mounting: Surface Mount
• Date Format: DW:DM:M:Y
• Time Format: HH:MM:SS
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-14
• Lead Free Status / RoHS Status: Compliant
• Other names: PCA2125TS/1,118

NXP Semiconductors
PCA2125_1
Product data sheet
Fig 19. Serial bus write example
Fig 20. Serial bus read example
address
address
counter
counter
SDO
SCL
SCL
SDI
SDI
CE
CE
R/W
R/W
b7
b7
xx
xx
0
1
b6
b6
0
0
b5
b5
0
In
are not connected together. In this configuration, it is important that pin SDI is never left
floating: it must always be driven either HIGH or LOW. If pin SDI is left open, high I
currents will result.
0
Figure 20
b4
b4
1
1
b3
b3
0
0
addr 02
addr 07
b2
b2
0
1
the Months and Years registers are read. In this example, pins SDI and SDO
b1
b1
HEX
1
HEX
1
b0
b0
0
1
b7
b7
0
0
02
07
Rev. 01 — 28 July 2008
b6
b6
1
0
seconds data 45
months data 11
b5
b5
0
0
b4
b4
0
1
b3
b3
0
0
BCD
BCD
b2
b2
1
0
b1
b1
0
0
b0
b0
1
1
b7
b7
0
0
03
08
b6
b6
0
0
minutes data 10
b5
b5
years data 06
0
0
SPI Real-time clock/calendar
b4
b4
1
0
b3
b3
0
0
BCD
BCD
b2
b2
0
1
PCA2125
© NXP B.V. 2008. All rights reserved.
b1
b1
0
1
001aaf915
001aaf916
b0
b0
0
0
04
09
DD
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