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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： | 16/16页 |
| 文件大小： | 121K |
| 代理商： | MSM58321RS |
Semiconductor
MSM58321
15
8
Name
Pin No.
Description
D0 ~ D3
Data input/output pins. (Bidirectional bus). The output is a open-drain type and
4.7 k
~ 10 k pull-up registers are required utilize these pins as output pins.
Ground pin.
ADDRESS WRITE pin is used to load address information from the D0 ~ D3 I/O
bus pins to the ADDRESS LATCH inside the IC; it is activated when it is at the H
level. This input is activated by the level, not by the edge. Figure 3 shows the
relationships between the D0 address input, ADDRESS WRITE input, and
ADDRESS LATCH input/output.
BUSY pin outputs the IC operation state. It is N-channel MOSFET open-drain
output. An external pull-up resistor of 4.6 k
or more must be connected (see
Figure 4) to use the BUSY output. The signals are output in negative logics. If
the oscillator oscillates at 32.768 kHz, the frequency is always 1 Hz regardless of
the CS1 and CS2 unless the D output of the ADDRESS DECODER inside the IC
is H (CODE = HLHH) and CS1 = CS2 = WRITE = H.
Figure 5 shows the BUSY output time chart.
427 s
BUSY
1 Hz (inside IC)
The counter inside the IC
starts counting at the
1 Hz signal leading edge.
244 s
122 s 61 s
Read/write-inhibited period
1 sec
Figure 5
BUSY
1 Hz (inside IC)
GND
ADDRESS
WRITE
BUSY
9
4 ~ 7
10
D0 input
ADDRESS WRITE
DI0
L
DO0
LATCH output
ADDRESS LATCH
(inside IC)
Figure 3
(peripheral circuit power)
4.7 k
or more
+5V
BUSY
N
RESET
WRITE
MSM58321RS
D
BUSY
Figure 4
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