PCF2127A 查看數據表（PDF） - NXP Semiconductors.
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PCF2127A Datasheet PDF : 80 Pages
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NXP Semiconductors
6. Block diagram
CLKOUT
OSCI
32.768 kHz
OSCO
TCXO
BBS
VDD
VBAT
VSS
RST
BATTERY BACK UP
SWITCH-OVER
CIRCUITRY
OSCILLATOR
MONITOR
internal
power
supply
TEMP
RESET
SPI-BUS
INTERFACE
SDA/CE
SDO
SDI
SCL
IFS
TS
PFI
1.25 V
(internal)
SERIAL BUS
INTERFACE
SELECTOR
I2C-BUS
INTERFACE
SCL
SDO
SDI
SDA/CE
TEMP
PCF2127A
512 BYTES
STATIC RAM
TEMPERATURE
SENSOR
PFO
Fig 1. Block diagram of PCF2127A
PCF2127A
Integrated RTC, TCXO and quartz crystal
INT
DIVIDER
AND
TIMER
1 Hz
LOGIC
CONTROL
ADDRESS
REGISTER
RPU
Control_1
00h
Control_2
01h
Control_3
02h
Seconds
03h
Minutes
04h
Hours
05h
Days
06h
Weekdays
07h
Months
08h
Years
09h
Second_alarm
0Ah
Minute_alarm
0Bh
Hour_alarm
0Ch
Day_alarm
0Dh
Weekday_alarm
0Eh
CLKOUT_ctl
0Fh
Watchdg_tim_ctl
10h
Watchdg_tim_val
11h
Timestp_ctl
12h
Sec_timestp
13h
Min_timestp
14h
Hour_timestp
15h
Day_timestp
16h
Mon_timestp
17h
Year_timestp
18h
Aging_offset
19h
RAM_addr_MSB
1Ah
RAM_addr_LSB
1Bh
RAM_wrt_cmd
1Ch
RAM_rd_cmd
1Dh
TEST
001aaj675
PCF2127A_2
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 7 May 2010
© NXP B.V. 2010. All rights reserved.
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