參數(shù)資料
型號: RF5C01A
廠商: RICOH COMPANY LTD
元件分類: XO, clock
英文描述: TRI N PLUG M PLAS 12-19
中文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO18
封裝: SOP-18
文件頁數(shù): 1/10頁
文件大?。?/td> 124K
代理商: RF5C01A
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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