RTC-64611A ETC1 [List of Unclassifed Manufacturers], RTC-64611A Datasheet - Page 2

• Manufacturer Part Number: RTC-64611A
• Description: 8-bit REAL TIME CLOCK MODULE
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

Note: Do not enter erroneous data for clock. This may result in time keeping error.
10-hour digit (b
Under-sec.
counter
Under-sec.
alarm register
Sec.to year
Day of week
A
B
C
D
0
1
2
3
4
5
6
7
8
9
E
F
1
mark
Supplement
Register table
Block diagram
32.768 KH
Be sure to enter “O” to TEST bit.
Bit name
RAM7 RAM6 RAM5 RAM4 TEST
Carry
H • START / STOP
ENB
OSC
flag
b
7
Z
I/0
Data bus
5
1
1 Hz
1 Hz
10-year digit
)
to I/0
10-sec. digit
10-min. digit
b
6
10-sec. digit
10-min. digit
3
Empty bit and unwriteable
Recognized as “0” while reading
Only for 24H mode
Read only (unwriteable)
Used as binary code data
Used as binary code data
Both counter and alarm register use BCD code
Coded data is used
EX: 0…Sunday
10-hour digit
10-hour digit
10-day digit
2 Hz
10-day digit
2 Hz
b
16 KHz
4…Thursday 5…Friday
2 KHz
32 Hz
5
64 Hz register / counter
Sec. register / counter
Min. register / counter
Hour register / counter
Day-of-week register / counter
Day register / counter
Month register / counter
Year register / counter
64 Hz alarm. register
Sec. alarm. register
Min. alarm. register
Hour alarm. register
Day-of-week alarm. register
Day alarm. register
Control register A
Control register B
Write
Read
Bus interface circuit
Address bus
10-month
digit
Carry
interruption
enable
A
4 Hz
4 Hz
0
b
to A
8 KHz
1 KHz
4
16 Hz
Data
3
1…Monday
Alarm
interruption
enable
8 Hz
8 Hz
b
512 Hz
4 KHz
8 KHz
3
1
Description
1-sec. digit
1-min. digit
1-hour digit
1-day digit
1-month digit
1-year digit
1-sec. digit
1-min. digit
1-hour digit
1-day digit
30-sec.
adjustment
16 Hz
Day-of-week digit
16 Hz
Day-of-week digit
256 Hz
b
CS
4 Hz
2
2…Tuesday 3…Wednesday
6…Saturday
RESET
32 Hz
OE
32 Hz
128 Hz
b
2 Hz
1
WE
S.START
/STOP
64 Hz
64 Hz
Alarm
64 Hz
1 Hz
flag
b
IRQ
0
Remarks
Counter
register
register
Control
Alarm
1 Hz
Read cycle time
Address access time
Chip select access time
Output enable access time
Output hold time
Chip select / output set time
Output enable / output set time
Chip deselect / output floating
Output disable / output floating
Write cycle time
Chip select time
Address valid time
Address setup time
Write pulse time
Address holding time
___
WE output floating
Input data set time
Input data hold time
Output disable / output floating
___
WE output set time
Switching characteristic
Read mode
Write mode
D
OE
CS
Address
OUT
Measuring condition
Input pulse level: 0.8 to 2.4V
Input rise time, fall time: 5 nsec.
IN/OUT timing pulse level: 1.5V
Out put load: 1 TTL Gate +100pF
WE
OE
CS
D
D
OUT
IN
Address
V
OL
V
OL
Item
Item
t
t
t
CHZ
OH
t
ACS
OLZ
t
OHZ
t
t
AA
AS
t
OE
t
RC
t
WC
Data valid
V
OL
t
t
CW
AW
V
OL
Real time clock module
Symbol
Symbol
t
WP
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
WHZ
t
OHZ
OHZ
ACS
CLZ
OLZ
CHZ
WC
CW
AW
WP
WR
DW
OW
OH
AS
DH
RC
AA
OE
t
DW
t
t
t
Min.
Min.
OH
OHZ
OHZ
85
—
10
85
75
60
10
40
5
0
0
0
0
5
t
t
W-R
DH
Max.
Max.
—
85
45
—
35
—
35
—
35
—
Unit
Unit
ns
ns
70