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參數(shù)資料
| 型號： | MSM58321 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | A Metal Gate CMOS Real Time Clock/Calendar with A Battery Backup Function(具有后備電池功能的金屬門CMOS實時時鐘電路) |
| 中文描述： | A金屬柵CMOS實時時鐘/與電池備份功能日歷（具有后備電池功能的金屬門的CMOS實時時鐘電路） |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 128K |
| 代理商： | MSM58321 |
Semiconductor
MSM58321
MSM58321
7
DESCRIPTION
The MSM 58321 is a metal gate CMOS Real
Time Clock/Calendar with a battery backup
function for use in bus-oriented micropro-
cessor applications.
The 4-bit bidirectional bus line method is used
for the data I/O circuit; the clock is set, cor-
rected, or read by accessing the memory.
REAL TIME CLOCK/CALENDAR
The time is read with 4-bit DATA I/O, AD-
DRESS WRITE, READ, and
BUSY
; it is written
with 4-bit DATA I/O, ADDRESS WRITE,
WRITE, and
BUSY
.
FEATURES
7 Function-Second, Minute, Hour, Day,
Day-of-Week, Month, Year
Automatic leap year calender
12/24 hour format
Frequency divider 5-poststage reset
Reference signal output
32.768 kHz crystal controlled operation
Single 5V power supply
Back-up battery operation to V
DD
= 2.2V
Low power dissipation
90
μ
W max. at V
DD
= 3V
2.5 mW max. at V
DD
= 5V
16 pin plastic DIP (DIP 16-P-300)
FUNCTIONAL BLOCK DIAGRAM
XT
XT
BUSY
STOP
TEST
WRITE
READ
CS1
CS2
D0
D1
D2
D3
RFB
OSC
2
15
1
R
BUSY
R
5-poststage (O
11
~O
15
)
1024 Hz
1 Hz
1/60 Hz
1/3600 Hz
\DATA BUS
3
N
TEST
D
E-F
SWITCH
1 Hz
WRITE
S1 S10
1/10 1/6
SECOND
MI1 MI10
1/10 1/6
MINUTE
H1 H10
1/12 or 1/24
HOUR
W
1/7
WEEK
4
3
4
4
3
4
WRIETE
S1 S10
MI1 MI10
H1 H10
W
R
p
R
p
R
p
R
p
R
p
R
p
READ
CS
DATA BUS
TEST-P
4
4
4
4
4
WRITE
D1 D10
1/10 1/3
DAY
MO1 MO10
1/12
MONTH
Y1 Y10
1/10 1/10
YEAR
D1
D10
MO1 MO10
Y1
Y10
R
p
= 200 k TYP
TRI-STATE
CONTROL
ADDRESS
LATCH
R
p
ADDRESS
WRITE
ADDRESS
DECODER
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E-F
S1
S10
MI1
H1
H10
W
D1
D10
MO1
Y1
Y10
D
E-F
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