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Register C
Register C is the read-only event status register.
Bits 0–3 - Unused Bits
These bits are always set to 0.
32KE–32KHz Enable Output
This bit may be set to a 1 only when the OSC2–OSC0
bits in register A are set to 011. Setting OSC2–OSC0 to
anything other than 011 clears this bit. If SQWE in reg-
ister B and 32KE are set, a 32.768KHz waveform is out-
put on the square wave pin.
UF - Update-Event Flag
This bit is set toa1attheendofthe update cycle.
Reading register C clears this bit.
AF - Alarm Event Flag
This bit is set to a 1 when an alarm event occurs. Read-
ing register C clears this bit.
PF - Periodic Event Flag
This bit is set to a 1 every tPI time, where tPI is the time
period selected by the settings of RS0–RS3 in register A.
Reading register C clears this bit.
INTF - Interrupt Request Flag
This flag is set to a 1 when any of the following is true:
AIE = 1 and AF = 1
PIE = 1 and PF = 1
UIE = 1 and UF = 1
Reading register C clears this bit.
Register D
Register D is the read-only data integrity status register.
Bits 0–6 - Unused Bits
These bits are always set to 0.
VRT - Valid RAM and Time
1 = Valid backup energy source
0 = Backup energy source is depleted
When the backup energy source is depleted (VRT = 0),
data integrity of the RTC and storage registers is not
guaranteed.
11
7654
3
210
---
UF
-
---
7654
3
210
--
AF
-
---
7654
3
210
-PF-
-
7654
3
210
INTF
-
Register D Bits
7654
3
210
VRT
000
0
000
7654
3
210
-
000
0
000
7654
3
210
VRT
---
-
---
Register C Bits
7654
3
210
INTF
PF
AF
UF
0
32KE
0
7654
3
210
----
0
-
0
7654
3
210
----
-
32KE
-
bq4285E/L
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相关代理商/技术参数
BQ4285ES 制造商:未知厂家 制造商全称:未知厂家 功能描述:
BQ4285L 制造商:未知厂家 制造商全称:未知厂家 功能描述:Enhanced RTC With NVRAM Control
BQ4285LP 制造商:TI 制造商全称:Texas Instruments 功能描述:Enhanced RTC With NVRAM Control
BQ4285LQ 制造商:未知厂家 制造商全称:未知厂家 功能描述:
BQ4285LS 制造商:Rochester Electronics LLC 功能描述:- Bulk
BQ4285LSTR 制造商:TI 制造商全称:Texas Instruments 功能描述:Enhanced RTC With NVRAM Control
BQ4285P- 制造商:TI 制造商全称:Texas Instruments 功能描述:Real-Time Clock RTC With NVRAM Control
BQ4285P-SB2 功能描述:实时时钟 RTC IC: 114x8 NVSRAM & NVSRAM Control RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube