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參數(shù)資料
| 型號： | RP5C01A |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | REAL-TIME CLOCK WITH INTERNAL RAM |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP18 |
| 封裝： | DIP-18 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 124K |
| 代理商： | RP5C01A |
REAL-TIME CLOCK
WITH INTERNAL RAM
1
RP/RF5C01A
OUTLINE
The RP/RF5C01A are real-time clocks for microcomputers that can be connected directly to buses of microcom-
puters with such CPUs as the 8085A or Z80 and allow setting or reading of the clock with the same procedures as
for the Read/Write operation for memory.
These products have various features such as clock and calendar counters, alarm functions, and 26
′
4bits RAM
which can be backed up by batteries. They can then be used as non-volatile RAM.
Connected directly to CPU 4bit bidirectional data bus : D0 - D3 4bit address input : A0 - A3
Built-in clock counter (hour, minute, second) and calendar counter (leap year, year, month, day, day-of-the-week)
Supports both 12-hour AM/PM clock and 24-hour clock
All clock data expressed in BCD codes ±30 second adjustment function
Backed up by batteries (minimum:2.2V) Built-in 26
′
4bits RAM
Outputs alarm signals or timing pulse of 16Hz or 1Hz.
Packages : 18pin DIP (RP5C01A) ; 18pin SOP(RF5C01A)
FEATURES
NO. EK-086-9804
BLOCK DIAGRAM
S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB
SC
4
3
4
2
3
4
OSCIN
OSCOUT
CS
CS
WR
RD
ADJ
OSC
1/2
15
1H
z
,16H
z
,
T-RESET
RD.WR.
MODE01
A-RESET
RD. WR.
MODE 00
ALARM
ALARM
OUTPUT
RD.WR.
MODE10,MODE11
CLOCK
HOLD
ADJ
HOLD
CONTROLLER
SO
SF
ADDRESS
BUS
CONTROL
INTERNAL
BUS
BUFFER
26
′
4bits
RAM
ALARM
4
SO-SC
SD
-SF
4
4
3
2
4
1
4
4
2
S0
SECONDS MINUTES
HOURS
DAYS
MONTHS
YEARS
W
1
/
7
L
1
/
4
Y
COMPARATOR
ALARM REGISTER
4
3
4
2
3
4
2
S
2
S
3
S
4
S
5
S
6
S
7
S
8
A
0
A
1
A
2
A
3
D
0
D
1
D
2
D
3
1
/
10
1
/
6
1
/
10
1
/
6
1
/
12
1
/
24
1
/
10
1
/
10
1
/
28
-
1
/
31
1
/
12
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