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参数资料
| 型号： | DS1374C-33 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16 |
| 封装： | 0.300 INCH, SOP-16 |
| 文件页数： | 11/15页 |
| 文件大小： | 616K |
| 代理商： | DS1374C-33 |
Special Purpose Registers
The DS1374 has two additional registers (07h–08h) that
control the WD/
ALM
counter and the square-wave, inter-
rupt, and reset outputs.
Control Register (07h)
Bit 7/Enable Oscillator (
EOSC
).
When set to logic 0,
the oscillator is started. When set to logic 1, the oscilla-
tor is stopped. When this bit is set to logic 1, the oscilla-
tor is stopped and the DS1374 is placed into a
low-power standby mode (I
DDR
). This bit is clear (logic
0) when power is first applied. When the DS1374 is
powered by V
CC
, the oscillator is always on regardless
of the state of the
EOSC
bit.
Bit 6/WD/
ALM
Counter Enable (WACE).
When set to
logic 1, the WD/
ALM
counter is enabled. When set to
logic 0, the WD/
ALM
counter is disabled, and the 24
bits can be used as NV RAM. This bit is clear (logic 0)
when power is first applied.
Bit 5/WD/
ALM
Counter Select (WD/
ALM
).
When set to
logic 0, the counter decrements every second until it
reaches zero and is then reloaded and restarted. When
set to logic 1, the WD/
ALM
counter decrements every
1/4096 of a second (approximately every 244μs) until it
reaches zero, sets the AF bit in the status register, and
stops. If any of the WD/
ALM
counter registers are
accessed before the counter reaches zero, the counter
is reloaded and restarted. This bit is clear (logic 0)
when power is first applied.
Bit 4/Battery-Backed Square-Wave Enable (BBSQW).
This bit, when set to logic 1, enables the square-wave
output when V
CC
is absent and when the DS1374 is
being powered by the V
BACKUP
pin. When BBSQW is
logic 0, the SQW pin goes high impedance when V
CC
falls below the power-fail trip point. This bit is disabled
(logic 0) when power is first applied.
Bit 3/Watchdog Reset Steering Bit (WDSTR).
This bit
selects which output pin the watchdog-reset signal
occurs on. When the WDSTR bit is set to logic 0, a
250ms pulse occurs on the
RST
pin if WD/
ALM
= 1 and
the WD/
ALM
counter reaches zero. The 250ms reset
pulse occurs on the
INT
pin when the WDSTR bit is set
to logic 1. This bit is logic 0 when power is first applied.
Bits 2, 1/Rate Select (RS2 and RS1).
These bits con-
trol the frequency of the square-wave output when the
square wave has been enabled. Table 3 shows the
square-wave frequencies that can be selected with the
RS bits. These bits are both set (logic 1) when power is
first applied.
Bit 0/Alarm Interrupt Enable (AIE).
When set to logic
1, this bit permits the alarm flag (AF) bit in the status
register to assert
INT
(when INTCN = 1). When set to
logic 0 or INTCN is set to logic 0, the AF bit does not
initiate the
INT
signal. If the WD/
ALM
bit is set to logic 1
and the AF flag is set, writing AIE to zero does not trun-
cate the 250ms pulse on the
INT
pin. The AIE bit is at
logic 0 when power is first applied. The
INT
output is
available while the device is powered by either supply.
D
I
2
C, 32-Bit Binary Counter Watchdog RTC with
Trickle Charger and Reset Input/Output
____________________________________________________________________
11
TCS3
X
X
X
1
1
1
1
1
1
0
TCS2
X
X
X
0
0
0
0
0
0
0
TCS1
X
X
X
1
1
1
1
1
1
0
TCS0
X
X
X
0
0
0
0
0
0
0
DS1
0
1
X
0
1
0
1
0
1
0
DS0
0
1
X
1
0
1
0
1
0
0
ROUT1
X
X
0
0
0
1
1
1
1
0
ROUT0
X
X
0
1
1
0
0
1
1
0
FUNCTION
Disabled
Disabled
Disabled
No diode, 250
resistor
One diode, 250
resistor
No diode, 2k
resistor
One diode, 2k
resistor
No diode, 4k
resistor
One diode, 4k
resistor
Power-on reset value
Table 4. Trickle Charge Register
Bit 7
EOSC
Bit 6
WACE
Bit 5
WD/
ALM
Bit 4
BBSQW
Bit 3
WDSTR
Bit 2
RS2
Bit 1
RS1
Bit 0
AIE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1374C-33- | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and Reset Input/Output |
| DS1374C-33# | 功能描述:实时时钟 I2C 32-Bit Binary Counter Watchdog 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 |
| DS1374C-33## | 制造商:Maxim Integrated Products 功能描述: |
| DS1374C-33# | 制造商:Maxim Integrated Products 功能描述:IC RTC BINARY SOIC-16 |
| DS1374C-33#T&R | 制造商:Maxim Integrated Products 功能描述:I2C 32-BIT BINARY COUNTER WATCHDOG RTC 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 16SOIC W - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC I2C W/CHARGER 16-SOIC 制造商:Maxim Integrated Products 功能描述:Real Time Clock I2C 32-Bit Binary Counter Watchdog |
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