- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9377 > ISL12029IBAZ-T (Intersil)IC RTC/CALENDAR EEPROM 14-SOIC PDF資料下載
參數(shù)資料
| 型號： | ISL12029IBAZ-T |
| 廠商： | Intersil |
| 文件頁數(shù)： | 18/29頁 |
| 文件大小： | 0K |
| 描述： | IC RTC/CALENDAR EEPROM 14-SOIC |
| 標準包裝： | 2,500 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，監(jiān)控器，監(jiān)視計時器 |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | I²C，2 線串口 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 電壓 - 電源，電池： | 1.8 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOICN |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
25
FN6206.10
December 16, 2010
I2C Communications During Battery Backup and
LVR Operation
Operation in Battery Backup mode and LVR is affected by
the BSW and SBIB bits as described earlier. These bits allow
flexible operation of the serial bus and EEPROM in battery
backup mode, but certain operational details need to be
clear before utilizing the different modes. The most
significant detail is that once VDD goes below VRESET, then
I2C communications cease regardless of whether the device
is programmed for I2C operation in battery backup mode.
Table 11 describes 4 different modes possible with using the
BSW and SBIB bits, and how they are affect LVR and battery
backup operation.
Mode A - In this mode, selection bits indicate a low VDD
switchover combined with I2C operation in battery backup
mode. In actuality the VDD will go below VRESET before
switching to battery backup, which will disable I2C
ANYTIME the device goes into battery backup mode.
Regardless of the battery voltage, the I2C will work down
Mode B - In this mode, the selection bits indicate
switchover to battery backup at VDD<VBAT, and I
2C
communications in battery backup. In order to
communicate in battery backup mode, the VRESET voltage
must be less than the VBAT voltage AND VDD must be
greater than VRESET. Also, pull-ups on the I
2C bus pins
must go to VBAT to communicate. This mode is the same
as the normal operating mode of the X1228 device
Mode C - In this mode, the selection bits indicate a low
VDD switchover combined with no communications in
battery backup. Operation is actually identical to Mode A
with I2C communications down to VDD =VRESET, then no
communications (see Figure 29).
Mode D - In this mode, the selection bits indicate
switchover to battery backup at VDD<VBAT, and no I
2C
communications in battery backup. This mode is unique in
that there is I2C communication as long as VDD is higher
than VRESET or VBAT, whichever is greater. This mode is
the safest for guaranteeing I2C communications only when
TABLE 11. I2C, LV RESET, AND BATTERY BACKUP OPERATION SUMMARY (SHADED ROW IS SAME AS X1228 OPERATION)
MODE
SBIB
BIT
BSW
BIT
VBAT
SWITCHOVER
VOLTAGE
I2C ACTIVE IN
BATTERY
BACKUP?
EE PROM WRITE/
READ IN BATTERY
BACKUP?
FREQ/IRQ
ACTIVE?
NOTES
A
0
Standard Mode,
VTRIP = 2.2V typ
Default for
ISL12029A
NO
YES
Operation of I2C bus down to
VDD =VRESET, then below that no
communications. Battery switchover
at VTRIP.
B
(X1228
mode)
0
1
Legacy Mode,
VDD < VBAT
Default for
ISL12029
YES, only if
VBAT > VRESET
YES
Operation of I2C bus into battery
backup mode, but only for
VBAT > VDD > VRESET.
Bus must have pull-ups to VBAT. No
nonvolatile writes with VBAT>VDD
C
1
0
Standard Mode,
VTRIP = 2.2V typ
NO
YES
Operation of I2C bus down to
VDD =VRESET, then below that no
communications. Battery switchover
at VTRIP.
D
1
Legacy Mode,
VDD < VBAT
NO
YES
Operation of I2C bus down to VRESET
or VBAT, whichever is higher.
ISL12029, ISL12029A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD5220BRZ50 | IC POT DGTL SGL 128POS 8SOIC |
| MS27484E12F22SA | CONN PLUG 22POS STRAIGHT W/SCKT |
| AD5220BRMZ100 | IC POT DGTL SGL 128POS 8USOIC |
| ISL12029IB30AZ-T | IC RTC/CALENDAR EEPROM 14-SOIC |
| AD5259BRMZ50 | IC POT DGTL 50K 256POS 10-MSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL12029IBZ | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM IN 14LD 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12029IBZ-T | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM IN 14LD 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12029IV27AZ | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 92VSET 14 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12029IV27AZ-T | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 92VSET 14 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ISL12029IV27Z | 功能描述:實時時鐘 REAL TIME CLKRTC W/ EPROM 2 7VSET 14 L 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復。