PCF2127AT/1 NXP [NXP Semiconductors], PCF2127AT/1 Datasheet - Page 3

• Manufacturer Part Number: PCF2127AT/1
• Description: Integrated RTC, TCXO and quartz crystal
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
6. Block diagram
PCF2127A_2
Product data sheet
Fig 1.
CLKOUT
SDA/CE
V
SDO
BBS
RST
V
SCL
V
SDI
BAT
IFS
PFI
DD
TS
SS
Block diagram of PCF2127A
(internal)
1.25 V
PFO
BATTERY BACK UP
SWITCH-OVER
OSCILLATOR
SERIAL BUS
INTERFACE
INTERFACE
INTERFACE
CIRCUITRY
SELECTOR
MONITOR
SPI-BUS
I
2
SDA/CE
C-BUS
TEMP
32.768 kHz
SDO
SCL
SDI
All information provided in this document is subject to legal disclaimers.
OSCO
OSCI
TEMPERATURE
internal
power
supply
RESET
STATIC RAM
Rev. 02 — 7 May 2010
512 BYTES
SENSOR
PCF2127A
TCXO
TEMP
R PU
TEST
Integrated RTC, TCXO and quartz crystal
REGISTER
CONTROL
ADDRESS
DIVIDER
TIMER
LOGIC
AND
1 Hz
INT
Watchdg_tim_val
Watchdg_tim_ctl
RAM_addr_MSB
Weekday_alarm
RAM_addr_LSB
RAM_wrt_cmd
Second_alarm
Minute_alarm
RAM_rd_cmd
Hour_timestp
Year_timestp
Mon_timestp
CLKOUT_ctl
Sec_timestp
Day_timestp
Aging_offset
Min_timestp
Hour_alarm
Timestp_ctl
Day_alarm
Weekdays
Control_1
Control_2
Control_3
Seconds
Minutes
Months
PCF2127A
Hours
Years
Days
© NXP B.V. 2010. All rights reserved.
001aaj675
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
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