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参数资料
| 型号： | DS1392U-33 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | XO, clock |
| 英文描述： | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO10 |
| 封装： | MO-187CBA, MICRO, SOP-10 |
| 文件页数： | 17/24页 |
| 文件大小： | 742K |
| 代理商： | DS1392U-33 |
Bit 7: Oscillator Stop Flag (OSF).
A logic 1 in this bit
indicates that the oscillator has stopped or was
stopped for some time and may be used to judge the
validity of the clock and calendar data. This bit is
edge-triggered and is set to logic 1 when the internal
circuitry senses the oscillator has transitioned from a
normal run state to a STOP condition. The following are
examples of conditions that can cause the OSF bit to
be set:
1) The first time power is applied.
2) The voltage present on V
CC
and V
BACKUP
is
insufficient to support oscillation.
3) The
EOSC
bit is turned off.
4) External influences on the crystal (i.e., noise,
leakage, etc.).
This bit remains at logic 1 until written to logic 0. This
bit can only be written to logic 0. Attempting to write
OSF to logic 1 leaves the value unchanged.
Bit 6: Alarm Flag (AF).
A logic 1 in the AF bit indicates
that the time matched the alarm registers. If the AIE bit
The INTCN bit used in the DS1390/DS1393 becomes
the SQW pin-enable bit in the DS1392. This bit powers
up a zero, making SQW active.
D
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
____________________________________________________________________
17
BIT 7
EOSC
BIT 6
0
BIT 5
BBSQI
BIT 4
RS2
BIT 3
RS1
BIT 2
ESQW
BIT 1
0
BIT 0
AIE
Control Register (0D/8Dh) (DS1392 Only)
BIT 7
OSF
BIT 6
0
BIT 5
0
BIT 4
0
BIT 3
0
BIT 2
0
BIT 1
0
BIT 0
AF
Status Register (0E/8Eh)
is logic 1 and the INTCN bit is set to logic 1, the
SQW/
INT
pin is also asserted. AF is cleared when writ-
ten to logic 0. This bit can only be written to logic 0.
Attempting to write to logic 1 leaves the value
unchanged.
Trickle-Charge Register (0F/8Fh)
The simplified schematic in Figure 9 shows the basic
components of the trickle charger. The trickle-charge
select (TCS) bits (bits 4 to 7) control the selection of
the trickle charger. To prevent accidental enabling,
only a pattern on 1010 enables the trickle charger. All
other patterns disable the trickle charger. The trickle
charger is disabled when power is first applied. The
diode-select (DS) bits (bits 2 and 3) select whether or
not a diode is connected between V
CC
and V
BACKUP
.
If DS is 01, no diode is selected or if DS is 10, a diode
is selected. The ROUT bits (bits 0 and 1) select the
value of the resistor connected between V
CC
and
V
BACKUP
. Table 5 shows the resistor selected by the
resistor-select (ROUT) bits and the diode selected by
the diode-select (DS) bits.
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
Initial default value—disabled
Table 5. Trickle-Charge Register
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1392U-33+ | 功能描述:实时时钟 Low-V SPI/3-Wire With Trickle Charger 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 |
| DS1393 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1393U+18 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Bulk |
| DS1393U+3 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Bulk |
| DS1393U+33 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Bulk |
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