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參數(shù)資料
| 型號： | BQ4285Q |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | XO, clock |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 21/26頁 |
| 文件大小： | 1079K |
| 代理商： | BQ4285Q |
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Functional Description
Address Map
The bq4285 provides 14 bytes of clock and control/status
registers and 114 bytes of general nonvolatile storage.
Figure 1 illustrates the address map for the bq4285.
Update Period
The update period for the bq4285 is one second. The
bq4285 updates the contents of the clock and calendar
locations during the update cycle at the end of each up-
date period (see Figure 2). The alarm flag bit may also
be set during the update cycle.
The bq4285 copies the local register updates into the
user buffer accessed by the host processor. Whena1is
written to the update transfer inhibit bit (UTI) in regis-
ter B, the user copy of the clock and calendar bytes re-
mains unchanged, while the local copy of the same bytes
continues to be updated every second.
The update-in-progress bit (UIP) in register A is set
tBUC time before the beginning of an update cycle (see
Figure 2). This bit is cleared and the update-complete
flag (UF) is set at the end of the update cycle.
4
Figure 1. Address Map
Figure 2. Update Period Timing and UIP
Jan. 1999 D
bq4285
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| BRN1-09P-TA1 | 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG |
| BRN1-09P-TA2 | 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG |
| BRN1-09P-TA3 | 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ4285Q- | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Real-Time Clock RTC With NVRAM Control |
| BQ4285S- | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Real-Time Clock RTC With NVRAM Control |
| BQ4285S-SB2 | 功能描述:實時時鐘 RTC IC: 114x8 NVSRAM & NVSRAM Control RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4285S-SB2G4 | 功能描述:實時時鐘 RTC IC: 114x8 NVSRAM & NVSRAM Control RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4285S-SB2TR | 功能描述:實時時鐘 RTC IC: 114x8 NVSRAM & NVSRAM Control RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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