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参数资料
| 型号： | DS32C35-33#T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/22页 |
| 文件大小： | 0K |
| 描述： | IC RTC ACCURATE I2C 3.3V 20-SOIC |
| 产品变化通告： | Product Discontinuation 28/Nov/2011 |
| 标准包装： | 1,000 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，FRAM，闰年，方波输出，TCXO/晶体 |
| 存储容量： | 8KB |
| 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 ~ 3.63 V |
| 电压 - 电源，电池： | 2.3 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 带卷 (TR) |
DS32B35/DS32C35
Alarms
The DS32B35/DS32C35 contain two time-of-day/date
alarms. Alarm 1 can be set by writing to registers 07h
to 0Ah. Alarm 2 can be set by writing to registers 0Bh
to 0Dh. The alarms can be programmed (by the alarm
enable and INTCN bits of the Control register) to acti-
vate the INT/SQW output on an alarm match condition.
Bit 7 of each of the time-of-day/date alarm registers are
mask bits (Table 4). When all the mask bits for each
alarm are logic 0, an alarm only occurs when the values
in the timekeeping registers match the corresponding
values stored in the time-of-day/date alarm registers.
The alarms can also be programmed to repeat every
second, minute, hour, day, or date. Table 4 shows the
possible settings. Configurations not listed in the table
will result in illogical operation.
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 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 corresponding Alarm Flag (“A1F”) or (“A2F”)
bit is set to logic 1. If the corresponding alarm interrupt
enable (“A1IE”) or (“A2IE”) is also set to logic 1 and the
INTCN bit is set to logic 1, the alarm condition will acti-
vate the INT/SQW signal.
Table 4. Alarm Mask Bits
ALARM 1 REGISTER MASK BITS (BIT 7)
DY/DT
A1M4
A1M3
A1M2
A1M1
ALARM RATE
X
1
Alarm once per second.
X
1
0
Alarm when seconds match.
X
1
0
Alarm when minutes and seconds match.
X
1
0
Alarm when hours, minutes, and seconds match.
0
Alarm when date, hours, minutes, and seconds match.
1
0
Alarm when day, hours, minutes, and seconds match.
ALARM 2 REGISTER MASK BITS (BIT 7)
DY/DT
A2M4
A2M3
A2M2
ALARM RATE
X
1
Alarm once per minute (00 seconds of every minute).
X
1
0
Alarm when minutes match.
X
1
0
Alarm when hours and minutes match.
0
Alarm when date, hours, and minutes match.
1
0
Alarm when day, hours, and minutes match.
Accurate I2C RTC with Integrated
TCXO/Crystal/FRAM
____________________________________________________________________
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