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參數(shù)資料
| 型號： | BQ4285LS-N |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | XO, clock |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| 封裝： | SOIC-24 |
| 文件頁數(shù)： | 25/30頁 |
| 文件大?。?/td> | 1497K |
| 代理商： | BQ4285LS-N |
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Functional Description
Address Map
The bq4285E/L provides 14 bytes of clock and con-
trol/status registers and 114 bytes of general nonvolatile
storage.
Figure 1 illustrates the address map for the
bq4285L.
Update Period
The update period for the bq4285E/L is one second. The
bq4285E/L updates the contents of the clock and calen-
dar locations during the update cycle at the end of each
update period (see Figure 2). The alarm flag bit may
also be set during the update cycle.
The bq4285E/L 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 B
bq4285E/L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BQ4285LSNTR | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BX80616I5650SLBLK | 64-BIT, 133 MHz, MICROPROCESSOR, PBGA1156 |
| BP83C51FA | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP40 |
| BU2465F | 4-BIT, MROM, 1 MHz, MICROCONTROLLER, PDSO18 |
| BU2419F-T1 | 4-BIT, MROM, 1 MHz, MICROCONTROLLER, PDSO22 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ4285LSTR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Enhanced RTC With NVRAM Control |
| BQ4285P- | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Real-Time Clock RTC With NVRAM Control |
| BQ4285P-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 |
| 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 |
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