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參數資料
| 型號： | R2043K-E2 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | 4-wire Serial Interface |
| 中文描述： | REAL TIME CLOCK, QCC12 |
| 封裝： | 2 X 2 MM, 1 MM HEIGHT, FFP-12 |
| 文件頁數： | 1/48頁 |
| 文件大小： | 458K |
| 代理商： | R2043K-E2 |
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’04.04.23
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Q
OUTLINE
The R2043K/T is a CMOS real-time clock IC connected to the CPU by four signal lines, CE, SCLK, SI, SO, and
configured to perform serial transmission of time and calendar data to the CPU. 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. 0.45
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 32.768kHz clock output
function (N-channel open drain output) is intended to output sub-clock pulses for the external microcomputer.
The oscillation adjustment circuit is intended to adjust time counts with high precision by correcting deviations in
the oscillation frequency of the crystal oscillator. Since the package for these ICs are TSSOP10G (4.0x2.9x1.0:
R2043T) or FFP12 (2.0x2.0x1.0: R2043K), high density mounting of ICs on boards is possible.
Q
FEATURES
O
Minimum Timekeeping supply voltage TYP:0.66 to 5.5v (Worst: 1.00V to 5.5v); VDD pin
O
Low power consumption
0.45
μ
A TYP at VDD=3V (1.00
μ
A MAX.)
O
Four signal lines (CE, SCLK, SI, and SO) required for connection to the CPU.
O
Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days,
and weeks) (in BCD format)
O
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
O
2 alarm interrupt circuits (Alarm_W for week, hour, and minute alarm settings and Alarm_D for hour and
minute alarm settings)
O
With Power-on flag to prove that the power supply starts from 0V
O
32-kHz clock output pin (N-channel open drain output)
O
Supply voltage monitoring circuit with two supply voltage monitoring threshold settings
O
Automatic identification of leap years up to the year 2099
O
Selectable 12-hour and 24-hour mode settings
O
High precision oscillation adjustment circuit
O
Built-in oscillation stabilization capacitors (CG and CD)
O
Package TSSOP10G (4.0mm x 2.9mm x 1.0mm: R2043T) FFP12 (2.0mm x 2.0mm x 1.0mm: R2043K)
O
CMOS process
Q
PIN CONFIGURATION
R2043T(TSSOP10G)
4-wire Serial Interface
R2043K/T
12345
Rev.2.06 - 1 -
SCLK
SO
/INTR
VSS
VDD
OSCIN
CE
1
2
3
4
5
6
7
9
TOP VIEW
32KOUT
10
8
SI
OSCOUT
VDD
(VSS)
S
VSS
10
11
12
1
2
34
TOP VIEW
R2043K(FFP12)
O
C
7
(VSS)
SI
S
3
/INTR
5
6
9
8
O
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相關代理商/技術參數 |
參數描述 |
|---|---|
| R2043T | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-wire Serial Interface |
| R2043T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-wire Serial Interface |
| R20440 | 制造商:Microsemi Corporation 功能描述:STD RECOVERY RECTFR 400V 12A 2PIN DO-4 - Bulk |
| R2045D | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-wire Serial Interface Real Time Clock Module |
| R2045S | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-wire Serial Interface Real Time Clock Module |
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