參數(shù)資料
型號(hào): DS17485S-5+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 7/31頁(yè)
文件大小: 0K
描述: IC RTC 5V 4K NV RAM 24-SOIC
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 31
類型: 時(shí)鐘/日歷
特點(diǎn): 警報(bào)器,夏令時(shí),閏年,NVSRAM,方波輸出
存儲(chǔ)容量: 4KB
時(shí)間格式: HH:MM:SS(12/24 小時(shí))
數(shù)據(jù)格式: YY-MM-DD-dd
接口: 并聯(lián)
電源電壓: 4.5 V ~ 5.5 V
電壓 - 電源,電池: 2.5 V ~ 3.7 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 24-SOIC W
包裝: 管件
Bits 3 to 0: Rate Selector Bits (RS3 to RS0). These
four rate-selection bits select one of the 13 taps on the
15-stage divider or disable the divider output. The tap
selected can be used to generate an output square
wave (SQW pin) and/or a periodic interrupt. The user
can do one of the following:
1) Enable the interrupt with the PIE bit;
2) Enable the SQW output pin with the SQWE or E32k
bits;
3) Enable both at the same time and the same rate; or
4) Enable neither.
Table 4 lists the periodic interrupt rates and the square-
wave frequencies that can be chosen with the RS bits.
DS17285/DS17287/DS17485/DS17487/DS17885/DS17887
Real-Time Clocks
____________________________________________________________________
15
Table 4. Periodic Interrupt Rate and Square-Wave Output Frequency
EXT REG B
SELECT BITS REGISTER A
E32K
RS3
RS2
RS1
RS0
tPI PERIODIC INTERRUPT
RATE
SQW OUTPUT FREQUENCY
0
None
0
1
3.90625ms
256Hz
0
1
0
7.8125ms
128Hz
0
1
122.070s
8.192kHz
0
1
0
244.141s
4.096kHz
0
1
0
1
488.281s
2.048kHz
0
1
0
976.5625s
1.024kHz
0
1
1.953125ms
512Hz
0
1
0
3.90625ms
256Hz
0
1
0
1
7.8125ms
128Hz
0
1
0
1
0
15.625ms
64Hz
0
1
0
1
31.25ms
32Hz
0
1
0
62.5ms
16Hz
0
1
0
1
125ms
8Hz
0
1
0
250ms
4Hz
0
1
500ms
2Hz
1
X
*
32.768kHz
*
RS3 to RS0 determine periodic interrupt rates as listed for E32K = 0.
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