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参数资料
| 型号： | BQ3285EQ |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | XO, clock |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封装： | PLASTIC, LCC-28 |
| 文件页数： | 2/30页 |
| 文件大小： | 1097K |
| 代理商： | BQ3285EQ |
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UTI - Update Transfer Inhibit
This bit inhibits the transfer of RTC bytes to the user
buffer:
1 = Inhibits transfer and clears UIE
0 = Allows transfer
Register C
Register C is the read-only event status register.
Bits 0, 1, 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 toa1atthe end of the 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.
10
Apr. 1999 D
Register C Bits
7654
3
210
INTF
PF
AF
UF
0
32KE
0
7654
3
210
----
0
-
0
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
UTI
---
-
---
7654
3
210
VRT
---
-
---
7654
3
210
----
-
32KE
-
bq3285E/L
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| BQ3285LCS | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BQ3285ECS | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BQ3285LDSSTRG4 | REAL TIME CLOCK, PDSO24 |
| BQ3285LDSS | 0 TIMER(S), REAL TIME CLOCK, PDSO24 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BQ3285EQ- | 制造商:TI 制造商全称:Texas Instruments 功能描述:Real-Time Clock RTC |
| BQ3285EQN | 制造商:TI 制造商全称:Texas Instruments 功能描述:Real-Time Clock RTC |
| BQ3285ES | 功能描述:实时时钟 w/242x8 NVSRAM Alarm Wake-up 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 |
| BQ3285ES- | 制造商:TI 制造商全称:Texas Instruments 功能描述:Real-Time Clock RTC |
| BQ3285ESG4 | 功能描述:实时时钟 w/242x8 NVSRAM Alarm Wake-up 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 |
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