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參數資料
| 型號： | RJ5C15 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | REAL-TIME CLOCK |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 137K |
| 代理商： | RJ5C15 |
DSCONTNUED
REAL-TIME CLOCK
1
RP/RF/RJ5C15
OUTLINE
The RP/RF/RJ5C15 are real-time clocks for microcomputers that can be connected directly to data buses of
16bit CPUs, such as the 8086, Z8000, and 68000, and of 8bit CPUs, such as the 8085A, Z80, 6809, and 6502. They
allow setting or reading of the clock with the same procedures as for the Read/Write operation for memory.
These products have various features including clock, calendar and alarm functions and can be backed up by
batteries.
Connected directly to CPU enabling fast access. 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)
All clock data expressed in BCD codes
Backed up by batteries (minimum : 2.0V)
Selectable basic clock frequency : 16kHz, 1kHz, 128Hz, 16Hz, 1Hz, 1/60Hz.
Outputs alarm signals or timing pulse of 16Hz or 1Hz. CMOS technology
Supply voltage : Single power supply of +5V
Packages RP5C15......18pin DIP
RF5C15......18pin SOP
RJ5C15......28pin PLCC
BLOCK DIAGRAM
FEATURES
NO. EK-086-9908
S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB
SC
3 4
3
4
2
3
4
OSCIN
OSCOUT
CS
CS
RD
WR
OSC
1/2
15
16
k
H
z
, 1
k
H
z
, 128H
z
, 16H
z
, 1H
z
, 1/60H
z
1H
z
, 16H
z
T.RESET
RD.WR.
BANK 1
ALARM
RESET
RD. WR.
ALARM
ALARM
OUTPUT
BANK 0. RD. WR.
CLOCK
HOLD
ADJ
HOLD
CONTROLLER
SO
SF
ADDRESS
DECODER
BUS
CONTROL
CLOCK
SELECT
CLOCK
OUTPUT
CLKOUT
ALARM
3
SD
-SF
4
4
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
2
3
4
5
6
7
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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