參數(shù)資料
型號(hào)： R2061K
英文描述： real-time clock ICs
中文描述： 實(shí)時(shí)時(shí)鐘IC
文件頁(yè)數(shù)： 1/48頁(yè)
文件大小： 322K
代理商： R2061K
’02.10.18
12345
3 wire interface Real-Time Clock ICs
with Battery Backup switch-over Function
R2061 Series
I
OUTLINE
The R2061 is a CMOS real-time clock IC connected to the CPU by three signal lines, CE, SCLK, and SIO, and
configured to perform serial transmission of time and calendar data to the CPU. Further, battery backup switchover
circuit and a voltage detector. The periodic interrupt circuit is configured to generate interrupt signals with six
selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals
at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due
to supply voltage is small, and the time keeping current is small (TYP. 0.4
μ
A at 3V). The oscillation halt sensing
circuit can be used to judge the validity of internal data in such events as power-on; The supply voltage monitoring
circuit is configured to record a drop in supply voltage below two selectable supply voltage monitoring threshold
settings. The oscillation adjustment circuit is intended to adjust time counts with high precision by correcting
deviations in the oscillation frequency of the crystal oscillator. Battery backup switchover function is the automatic
switchover circuit between a main power supply and a backup battery of primary or secondary battery. Switchover is
executed by monitoring the voltage of a main power supply, therefore the voltage of a backup battery voltage is not
relevant. This model comes in an ultra-compact FFP12 (Height 0.85mm, 2.0mm
×
2.0mm).
I
FEATURES
G
Minimum Timekeeping supply voltage Typ. 0.75V (Max. 1.00V); VDD pin
G
Low power consumption
G
Built-in Backup switchover circuit (can be used for a primary battery, a secondary battery, or an electric double
layer capacitor)
G
Three signal lines (CE, SCLK, and SIO) required for connection to the CPU.
(Maximum clock frequency of 1MHz (with VCC = 3V) )
G
Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days,
and weeks) (in BCD format)
G
Interrupt circuit configured to generate interrupt signals (with interrupts ranging from 0.5 seconds to 1 month) to
the CPU and provided with an interrupt flag and an interrupt halt
G
2 alarm interrupt circuits (Alarm_W for week, hour, and minute alarm settings and Alarm_D for hour and minute
alarm settings)
G
Built-in voltage detector with delay
G
With Power-on flag to prove that the power supply starts from 0V
G
Supply voltage monitoring circuit with two supply voltage monitoring threshold settings
G
Automatic identification of leap years up to the year 2099
G
Selectable 12-hour and 24-hour mode settings
G
High precision oscillation adjustment circuit
G
CMOS process
I
PIN CONFIGURATION
R2061K(FFP12)
12345
Rev.1.00 - 1 -
0.4
μ
A TYP (1.0
μ
A MAX.)
at VDD=3V
G
Built-in oscillation stabilization capacitors (CG and CD)
G
Ultra-compact FFP12
VDD
VCC
S
VSS
10
11
12
1
2
34
TOP VIEW
7
VSB
CE
S
/
CIN
5
6
9
8
O
O
/
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R2061K01-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:wire interface Real-Time Clock ICs with Battery Backup switch-over Function
R2061K03-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:wire interface Real-Time Clock ICs with Battery Backup switch-over Function
R2061S02-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:wire interface Real-Time Clock ICs with Battery Backup switch-over Function
R2062 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs with Battery Backup switch-over Function
R2062K01-E2 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs with Battery Backup switch-over Function
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