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參數(shù)資料
| 型號： | BQ3285LDSSTRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | XO, clock |
| 英文描述： | REAL TIME CLOCK, PDSO24 |
| 封裝： | 0.150 INCH, GREEN, PLASTIC, SSOP-24 |
| 文件頁數(shù)： | 22/27頁 |
| 文件大?。?/td> | 170K |
| 代理商： | BQ3285LDSSTRG4 |
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Functional Description
Address Map
The bq3285ED/LD provides 14 bytes of clock and con-
trol/status registers and 242 bytes of general nonvolatile
storage.
Figure 1 illustrates the address map for the
bq3285ED/LD.
Update Period
The update period for the bq3285ED/LD is one second.
The bq3285ED/LD updates the contents of the clock and
calendar 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 bq3285ED/LD copies the local register updates into
the user buffer accessed by the host processor. When a 1
is written to the update transfer inhibit bit (UTI) in reg-
ister 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
FG328501.eps
Clock and
Control Status
Registers
00
0D
0E
7F
00
7F
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Seconds
Seconds Alarm
Minutes
Minutes Alarm
Hours
Hours Alarm
Day of Week
Date of Month
Month
Year
Register A
Register B
Register C
Day of Month
Alarm
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
Storage
Registers
with
EXTRAM = 1
16 Bytes
0
13
14
127
0
127
Storage
Registers
with
EXTRAM = 0
128
Bytes
114
Bytes
BCD
or
Binary
Format
Figure 1. Address Map
Update Period
(1 sec.)
TD3285e1.eps
tUC (Update Cycle)
tBUC
UIP
Figure 2. Update Period Timing and UIP
bq3285ED/LD
July 1997
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BQ3285LDSS | 0 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BQ3285EDSS | 0 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BQ3285LSS | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BQ3285S | 1 TIMER(S), REAL TIME CLOCK, PDSO24 |
| BQ3387P | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ3285LF | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Y2K-Enhanced Real-Time Clock (RTC) |
| BQ3285LF-SS | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Y2K-Enhanced Real-Time Clock (RTC) |
| BQ3285LFSS-A1 | 功能描述:實(shí)時時鐘 w/240x8 NVSRAM Alarm Wake-up 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 |
| BQ3285LFSS-A1G4 | 功能描述:實(shí)時時鐘 w/240x8 NVSRAM Alarm Wake-up 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 |
| BQ3285LFSS-A1TR | 功能描述:實(shí)時時鐘 w/240x8 NVSRAM Alarm Wake-up 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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