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参数资料
| 型号： | MSM58321RS |
| 厂商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| 封装： | 0.300 INCH, PLASTIC, DIP-16 |
| 文件页数： | 1/16页 |
| 文件大小： | 121K |
| 代理商： | MSM58321RS |
Semiconductor
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.
Semiconductor
MSM58321
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 VDD = 2.2V
Low power dissipation
90
W max. at VDD = 3V
2.5 mW max. at VDD = 5V
16 pin plastic DIP (DIP 16-P-300)
FUNCTIONAL BLOCK DIAGRAM
XT
BUSY
STOP
TEST
WRITE
READ
CS1
CS2
D0
D1
D2
D3
RFB
OSC
215
1
R
BUSY
R
5-poststage (O11~O15)
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
43
4
43
4
WRIETE
S1 S10
MI1 MI10
H1 H10
W
Rp
READ
CS
DATA BUS
TEST-P
44
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
Rp = 200 k TYP
TRI-STATE
CONTROL
ADDRESS
LATCH
Rp
ADDRESS
WRITE
ADDRESS
DECODER
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E-F
S1
S10
MI1
MI10
H1
H10
W
D1
D10
MO1
MO10
Y1
Y10
D
E-F
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