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参数资料
| 型号： | RTC-7301SFB |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO24 |
| 封装： | SSOP-24 |
| 文件页数： | 5/28页 |
| 文件大小： | 274K |
| 代理商： | RTC-7301SFB |
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RTC - 7301 SF / DG
Page - 10
MQ332-05
6-2-4. FOUT frequency setting registers ( Bank1, Reg-C and D )
Address
Registers
bit 3
bit 2
Bit 1
bit 0
C
FOUT divider ratio
setting
!
FD2
FD1
FD0
D
FOUT frequency
setting
FE
!
FD4
FD3
FE bit: ( Fout Enable )
When the FCON bit is “H,” the specified frequency (source clock) is output from the FOUT pin at the specified
divider ratio when the FE bit is “1.”
When the FE bit is “0,” output enters a prohibitive state (high impedance).
When the FCON pin is “L,” 32.768 kHz is output from the FOUT pin regardless of the content of the Reg-C and D.
Note) Internally, [FCON pin = “H”] on the RTC-7301DG.
FD bit
FD4
FD3
Source clock
FD2
FD1
FD0
Divider ratio
FOUT duty
0
32768 Hz
0
1 / 1
1 / 2
0
1
1024 Hz
0
1
1 / 2
1
0
32 Hz
0
1
0
1 / 3
1
1 Hz
0
1
1 / 6
1 / 2
1
0
1 / 5
1
0
1
1 /10
1 / 2
1
0
1 /15
1 / 3
1
1 /30
1 / 2
6-2-5. Timer register ( Bank2, Reg-4 to Reg-8 and Reg-E )
These registers control the 8 bit pre-settable down-counter used in the timer interrupt.
The down-counter counting cycle (source clock) is specified by Reg-8 TD0 and TD1.
Reg-4 and 5 specify the pre-set
(divider) value of the down-counter.
The down-counter continues counting down using the specified source clock period.
When it reaches zero, the TF
(Timer Flag) is set to “1.”
At this time, when the Reg-E TIE (Timer Interrupt Enable) bit is “1,” the /IRQ pin becomes a Low level and an interrupt
occurs.
When the TIE bit is “0,” output from the /IRQ pin is prohibited.
Also, when the TI / TP bits are “1,” the timer counter register data is re-loaded and another count-down is started.
(Repeat operation)
Timer interrupt source clock selections
TD1
TD0
Source clock
IRQ automatic return time
0
4096 Hz
0.122 ms
0
1
64 Hz
7.81 ms
1
0
Update in
seconds
7.81 ms
1
Update in
minutes
7.81 ms
Timer interrupt intervals
Source clock
Timer counter
setting values
4096 Hz
64 Hz
Update in
seconds
Update in
minutes
0
-
1
244.14
s
15.625 ms
1 s
1 min
2
488.28
s
31.250 ms
2 s
2 min
3
732.42
s
46.875 ms
3 s
3 min
255
62.26 ms
3.984 s
255 s
255 min
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相关代理商/技术参数 |
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| RTC-8564JE | 制造商:Epson Toyocom Corporation 功能描述:32.768kHz 275nA@3ViTyp.j 3.0V (typ.) 7.0~5.4~1.5mm +85 -40 5}23ppm@+25/3.0V 7mm 5.4mm 1.5mm 制造商:Epson Toyocom Corporation 功能描述:RTC I2C BUS INTERFACE SMD VSOJ-20 制造商:Epson Toyocom Corporation 功能描述:RTC I2C BUS INTERFACE, SMD, VSOJ-20 制造商:Epson Toyocom Corporation 功能描述:IC, RTC, FULL CALENDAR, VSOJ-20; Clock Format:12Hr / 24Hr; Clock IC Type:RTC; Supply Voltage Min:1.8V; Supply Voltage Max:5.5V; Digital IC Case Style:VSOJ; No. of Pins:20; IC Interface Type:I2C; Operating Temperature Min:-40C ;RoHS Compliant: Yes 制造商:Epson Toyocom 功能描述:RTC module,I2C Bus,Alarm,timer func |
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