RTC-63421 ETC [List of Unclassifed Manufacturers], RTC-63421 Datasheet - Page 2

• Manufacturer Part Number: RTC-63421
• Description: 4-bit MULTIFUNCTIONAL REAL TIME CLOCK MODULE
• Manufacturer: ETC [List of Unclassifed Manufacturers]

A-S
A-S
A-MI
A-MI
A-H
A-H
A-D
A-D
A-MO
A-MO
A-W
A-EMB
C
C
C
C
A
B
C
D
0
1
2
3
4
5
6
7
8
9
E
F
Symbol
register
Interface possible
with external
terminals
C
D
E
F
V
CS
of
DD
1
10
1
10
1
10
Data hoiding timing
Register table
1
1
10
Symbol
register
R-S
R-S
R-MI
R-MI
R-H
R-H
R-D
R-D
R-MO
R-MO
R-Y
R-Y
R-W
C
C
C
1
10
D
E
F
of
1
10
1
10
1
10
1
10
1
10
1
10
V
HD/SFT
a-mo
IL
a-mi
a-S
a-h
a-d
ae
2
D
3
8
IT/PLS
BANK
BANK
r-mo
FLAG
8
8
8
r-mi
r-y
IRQ
r-S
8
r-h
r-d
r-y
8
D
3
80
8
8
8
8
8
8
0
1
0
2
t
V
CDR
IL
a-
a-mi
a-mo
a-mi
a-S
24/12
Same as BANK 0
a-S
r-w
a-h
a-d
PM/AM
CY
ae
D
r-
IT/PLS
r-mi
r-mo
RESET
r-S
r-mi
2
r-y
STOP
__
r-S
r-w
4
r-h
PM/AM
r-d
r-y
40
2
4
___
4
4
4
D
40
4V
4
4
2
40
40
4
___
4
4
4
40
4
4
CS
4
BANK 1
BANK 0
1
Data holding mode
0
or WR not occurred
a-mi
a-mo
TEST
a-mi
a-S
a-h
a-d
a-w
a-S
a-h
a-d
CAL
CY
ae
MASK
30 sec.
D
r-mi
r-mo
CS
FLAG
r-mi
2 to 4V
r-S
r-h
r-d
IRQ
r-y
r-w
r-S
r-h
r-d
ADJ
r-y
1
D
20
20
20
2
1
2
2
2
20
2
1
2
1
2
2
20
20
20
20
2
2
2
2
20
2
2
2
2
2
1/5V
DD
a-mo
a-mi
a-mo
TEST
r-mo
a-S
a-mi
MASK
a-h
a-d
D P
r-mi
r-mo
a-S
a-w
FLAG
a-h
a-d
r-mi
READ
CY
r-S
r-h
r-d
IRQ
FLAG
ae
r-y
r-w
r-S
r-h
r-d
D
r-y
D
4V
0
1
10
10
10
0
0
10
1
1
1
10
10
10
10
1
1
10
1
1
1
1
10
1
1
1
1
10
1
1
1
t
V
R
IL
1 - sec. digit register
10 - sec. digit register
1 - min. digit register
10 - min. digit register
1 - hour digit register
10 - hour digit register
1 - day digit register
10 - day digit register
1 - month digit register
10 - month digit register
Week register
Area define register
Test register
Control register D
Control register E
Control register F
1 - sec. digit register
10 - sec. digit register
1 - min. digit register
10 - min. digit register
1 - hour digit register
10 - hour digit register
1 - day digit register
10 - day digit register
1 - month digit register
10 - month digit register
1 - year digit register
10 - year digit register
Week register
Control register D
Control register E
Control register F
register name
register name
Real time
Alarm
Interface possible
with the external
terminals
V
IH
Switching characteristics on the Intel bus system are the same as those for the RTC-6242 series.
A
D
D
A
R/W
R/W, address setup time
E “H” pulse width
R/W, address hold time
E “L” pulse width
E cycle time
DATA setup time
DATA hold time
E to data (CL=150pF)
Data hold
0
0
R/W
0
0
E
to A
to D
E
Motorola bus system
to A
to D
__
__
Write mode
Read mode
Switching characteristics
3
3
3
3
V
V
Item
V
IL1
V
V
IH1
t
IH1
V
RWE
IH1
IL1
t
IL1
V
RWE
V
IL 1
IL1
V
t
V
IH1
RD
IH
V
V
t
IH1
IL1
t
EHW
EHW
t
V
V
DS
OH1
OL1
V
IH1
t
V
t
EC
IH1
EC
V
V
Real time clock module
Symbol
IH1
V
IL1
t
t
V
V
V
V
ERW
V
DH
( V
IL1
t
t
t
IH1
OH1
OL1
t
IL 1
IL1
t
t
t
V
V
RWE
EHW
ERW
ELW
t
t
V
t
EC
DS
DH
RD
ED
IH1
IH1
DD
V
ED
IL1
t
IL1
ELW
= 5V 0.5V, Ta = 0 to + 70˚C )
t
ERW
t
ELW
Min.
100
220
220
500
180
20
20
10
––
V
IL
V
Max.
120
IL
––
––
Unit
ns
58