PCA2129T/Q900/2,51 NXP Semiconductors, PCA2129T/Q900/2,51 Datasheet - Page 45

• Manufacturer Part Number: PCA2129T/Q900/2,51
• Description: Real Time Clock
• Manufacturer: NXP Semiconductors
• Series: PCA2129r

Specifications of PCA2129T/Q900/2,51

• Rohs: yes
• Function: Clock, Calendar, Alarm, Watchdog, Timestamp
• Rtc Bus Interface: I2C, SPI
• Date Format: Binary
• Time Format: Binary
• Supply Voltage - Max: 4.2 V
• Supply Voltage - Min: 1.8 V
• Maximum Operating Temperature: + 80 C
• Minimum Operating Temperature: - 30 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-16
• Battery Backup Switching: Yes

NXP Semiconductors
9. Interfaces
PCA2129T
Product data sheet
Fig 26. Interface selection
a. SPI-bus interface selection
SDO
SCL
V
V
SDI
CE
DD
SS
To select the SPI-bus interface, pin IFS has to be
connected to pin V
SDA/CE
The PCA2129T has an I
done using the interface selection pin IFS (see
Table 48.
Pin
IFS
SDO
SCL
V
SS
SDI
IFS
SS
.
1
2
3
4
5
6
7
8
PCA2129
Connection
BBS
V
SS
Interface selection input pin IFS
16
15
14
13
12
11
10
All information provided in this document is subject to legal disclaimers.
9
V
BBS
013aaa127
DD
Rev. 3 — 24 January 2013
2
C-bus or SPI-bus interface using the same pins. The selection is
Accurate RTC with integrated quartz crystal for automotive
Bus interface
SPI-bus
I
2
C-bus
b. I
SDA
V
SCL
V
DD
SS
To select the I
connected to pin BBS.
2
C-bus interface selection
Table
R PU
48).
2
C-bus interface, pin IFS has to be
R PU
SDA/CE
SDO
SCL
V
SDI
IFS
SS
Reference
Section 9.1
Section 9.2
1
2
3
4
5
6
7
8
PCA2129
PCA2129T
© NXP B.V. 2013. All rights reserved.
16
15
14
13
12
11
10
9
V
BBS
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DD
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