参数资料
| 型号： | ISL12024IRTCZ |
| 厂商： | Intersil |
| 文件页数： | 16/24页 |
| 文件大小： | 0K |
| 描述： | IC RTC/CALENDER 64BIT 8-TDFN |
| 标准包装： | 100 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，唯一 ID |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TDFN |
| 供应商设备封装： | 8-TDFN（3x3） |
| 包装： | 管件 |
23
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FN6749.1
December 15, 2011
Note that the status register AL0 bit will be set each time the
alarm is triggered, but does not need to be read or cleared.
I2C Communications During Battery Backup
Operation in Battery Backup Mode 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. Table 8 describes four different
modes possible with using the BSW and SBIB bits, and how
they affect the serial interface and battery backup operation.
Mode A - In this mode, selection bits indicate a Standard
Mode switchover combined with I2C operation in Battery
Backup Mode. When the VDD voltage drops below the
lower of VTRIP or VBAT, then the device will enter Battery
Backup Mode. If the microcontroller and bus pull-ups are
also powered by the battery, then the ISL12024IRTCZ can
communicate in Battery Backup Mode.
Mode B - In this mode selection, bits indicate Legacy
Mode switchover combined with I2C operation in Battery
Backup Mode. When the VDD voltage drops below VBAT,
the device will enter Battery Backup Mode. If the
microcontroller and bus pull-ups are also powered by the
battery, then the ISL12024IRTCZ can communicate in
Battery Backup Mode. This mode places the
ISL12024IRTCZ device in the same operating mode as
the X1226 legacy device.
Mode C - This mode combines Standard Mode battery
switchover with no I2C operation in Battery Backup Mode.
When the VDD voltage drops below the lower of VTRIP or
VBAT, then the device will enter Battery Backup Mode and
the I2C interface will be disabled, minimizing VBAT current
drain.
Mode D - This mode combines Legacy Mode battery
switchover with no I2C operation in Battery Backup Mode.
When the VDD voltage drops below VBAT, the device will
enter Battery Backup Mode and the I2C interface will be
disabled, minimizing VBAT current drain.
Note that the IRQ/FOUT open drain output pin is active in
battery backup for all modes, allowing clocking of devices
while in Battery Backup Mode. The pull-up on the pin will
need to go to VBAT, and thus battery mode current draw will
increase accordingly.
TABLE 8.
MODE
SBIB BIT
BSW BIT
VBAT
SWITCHOVER
VOLTAGE
I2C ACTIVE IN
BATTERY
BACKUP?
EEPROM
WRITE/READ
IN BATTERY
BACKUP?
FREQ/IRQ
ACTIVE?
NOTES
A
0
Standard Mode,
VTRIP = 2.2V typ
Yes
NO
YES, needs
pull-up to VBAT
VBAT switchover at lower of VBAT or
VTRIP. Pull-ups needed on I
2C to
VBAT to operate in Battery Backup.
B (X1226
Mode)
0
1
Legacy Mode,
VDD < VBAT
Yes
NO
YES, needs
pull-up to VBAT
VBAT switchover at <VDD. Pull-ups
needed on I2C to VBAT to operate in
Battery Backup.
C
1
0
Standard Mode,
VTRIP = 2.2V typ
NO
YES, needs
pull-up to VBAT
VBAT switchover at lower of VBAT or
VTRIP.
D
1
Legacy Mode,
VDD < VBAT
NO
YES, needs
pull-up to VBAT
VBAT switchover at <VDD.
ISL12024IRTC
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| ISL12024IRTCZ-T | 功能描述:实时时钟 RTC OUTPUT PROGRAM TO 32KHZ W/EEPROM 8 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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