参数资料
型号: M41T94MQ6E
厂商: STMICROELECTRONICS
元件分类: 时钟/数据恢复及定时提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO16
封装: ROHS COMPLIANT, PLASTIC, SOIC-16
文件页数: 15/41页
文件大小: 352K
代理商: M41T94MQ6E
Clock operations
M41T94
4.6
Power-on reset
The M41T94 continuously monitors VCC. When VCC falls to the power fail detect trip point,
the RST pulls low (open drain) and remains low on power-up for tREC after VCC passes VPFD
(max). The RST pin is an open drain output and an appropriate pull-up resistor should be
chosen to control rise time.
4.7
Reset inputs (RSTIN1 & RSTIN2)
The M41T94 provides two independent inputs which can generate an output reset. The
duration and function of these resets is identical to a reset generated by a power cycle.
Table 7 on page 23 and Figure 13 on page 23 illustrate the AC reset characteristics of this
function. Pulses shorter than tRLRH1 and tRLRH2 will not generate a reset condition. RSTIN1
and RSTIN2 are each internally pulled up to VCC through a 100 kΩ resistor.
Table 6.
Square wave output frequency
Square wave bits
Square wave
RS3
RS2
RS1
RS0
Frequency
Units
0000
None
0001
32.768
kHz
0010
8.192
kHz
0011
4.096
kHz
0100
2.048
kHz
0101
1.024
kHz
0110
512
Hz
0111
256
Hz
1000
128
Hz
1001
64
Hz
1010
32
Hz
1011
16
Hz
11008
Hz
11014
Hz
11102
Hz
11111
Hz
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