RJ5C15 RICOH Co.,Ltd., RJ5C15 Datasheet
RJ5C15
Manufacturer Part Number
RJ5C15
Description
PLCC28
Manufacturer
RICOH Co.,Ltd.
Datasheet
1.RJ5C15.pdf
(12 pages)
Specifications of RJ5C15
Date_code
04+
RP/RF/RJ5C15
• Connected directly to CPU enabling fast access.
• 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.
• Supply voltage : Single power supply of +5V
• Packages RP5C15 ...... 18pin DIP
OUTLINE
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.
batteries.
FEATURES
BLOCK DIAGRAM
The RP/RF/RJ5C15 are real-time clocks for microcomputers that can be connected directly to data buses of
These products have various features including clock, calendar and alarm functions and can be backed up by
RF5C15 ...... 18pin SOP
RJ5C15 ...... 28pin PLCC
OSCOUT
OSCIN
CS
CS
WR
RD
OSC
CONTROLLER
CLOCK
HOLD
HOLD
1/2
ADJ
15
16
k
T.RESET
RD.WR.
H
SD
-SF
z
ALARM
RESET
RD. WR.
4
4
BANK 1
, 1
SECONDS MINUTES
1
/
S0
10
k
H
z
1
S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB SC
3 4
/
, 128H
6
SO
SF
4
A
1
0
ADDRESS
DECODER
/
10
A
S
3
3
ALARM REGISTER
2
1
1
z
COMPARATOR
/
A
, 16H
6
S
2
4
4
3
1
• 4bit bidirectional data bus : D0 - D3
A
/
HOURS
12
3
S
2
2
z
4
1
, 1H
/
24
S
CONTROL
3
3
D
5
REAL-TIME CLOCK
1
0
z
/
• CMOS technology
, 1/60H
7
BUS
D
S
4
4
6
1
1
/
D
DAYS
28
S
2
2
2
-
7
1
/
D
31
z
3
S
4
8
MONTHS
BANK 0. RD. WR.
1
/
1
12
SELECT
CLOCK
4
1
/
YEARS
10
ALARM
3
4
1
/
10
2
1
/
4
OUTPUT
CLOCK
1H
z
OUTPUT
ALARM
, 16H
CLKOUT
z
ALARM
NO. EK-086-9908
1
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