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参数资料
| 型号： | DS1390 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| 中文描述： | 低电压SPI/3线接口RTC，带有涓流充电器 |
| 文件页数： | 15/24页 |
| 文件大小： | 742K |
| 代理商： | DS1390 |
The DY/
DT
bits (bit 6 of the alarm day/date registers)
control whether the alarm value stored in bits 0 to 5 of
that register reflects the day of the week or the date of
the month. If DY/
DT
is written to logic 0, the alarm is the
result of a match with date of the month. If DY/
DT
is
written to a logic 1, the alarm is the result of a match
with day of the week.
When the RTC register values match alarm register set-
tings, the alarm-flag (AF) bit is set to logic 1. If the
alarm-interrupt enable (AIE) is also set to logic 1 and
the INTCN bit is set to logic 1, the alarm condition acti-
vates the SQW/
INT
signal.
Since the contents of register 08h are expected to nor-
mally contain a match value of 00–99 decimal, the
codes F[0–9], and FF have been used to tell the part to
mask the tenths or hundredths of seconds accordingly.
Power-Up/Down, Reset, and
Pushbutton Reset Functions
A precision temperature-compensated reference and
comparator circuit monitors the status of V
CC
. When an
out-of-tolerance condition occurs, an internal power-fail
signal is generated that blocks read/write access to the
device and forces the
RST
pin (DS1391/DS1393 only)
low. When V
CC
returns to an in-tolerance condition, the
internal power-fail signal is held active for t
RST
to allow
the power supply to stabilize, and the
RST
(DS1391/
DS1393 only) pin is held low. If the
EOSC
bit is set to
logic 1 (to disable the oscillator in battery-backup
mode), the internal power-fail signal and the
RST
pin is
kept active for t
RST
plus the startup time of the oscillator.
The DS1391/DS1393 provide for a pushbutton switch to
be connected to the
RST
output pin. When the
DS1391/DS1393 are not in a reset cycle, it continuously
monitors the
RST
signal for a low-going edge. If an
edge is detected, the part debounces the switch by
pulling the
RST
pin low and inhibits read/write access.
After PB
DB
has expired, the part continues to monitor
the
RST
line. If the line is still low, it continues to monitor
the line looking for a rising edge. Upon detecting
release, the part forces the
RST
pin low and holds it low
for an additional PB
DB
.
D
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
____________________________________________________________________
15
相关PDF资料 |
PDF描述 |
|---|---|
| DS1392U-33 | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1391U-3 | IGBT Module; Continuous Collector Current, Ic:200A; Collector Emitter Saturation Voltage, Vce(sat):3.4V; Power Dissipation, Pd:1500W; Collector Current:200A; Collector Emitter Voltage, Vceo:1.2kV; Leaded Process Compatible:No RoHS Compliant: No |
| DS1391U-33 | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1390U-3 | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
| DS1390U-33 | Low-Voltage SPI/3-Wire RTCs with Trickle Charger |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1390_07 | 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 |
| DS1390_09 | 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 |
| DS1390-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 |
| DS1390U+18 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Bulk |
| DS1390U+3 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Bulk |
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