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HT1381实时时钟芯片手册
资料介绍
HT1381实时时钟芯片详细资料，编程必备
部分文件列表
| 文件名 | 大小 |
| HT1381.pdf | 199K |
部分页面预览
（完整内容请下载后查看）HT1380/HT1381
Serial Timekeeper Chip
Features
·
·
Operating voltage: 2.0V~5.5V
Maximum input serial clock: 500kHz at
DD=2V, 2MHz at VDD=5V
·
Two data transmission modes: single-byte,
or burst mode
Serial I/O transmission
V
·
·
·
·
·
Operating current: less than 400nA at 2V,
less than 1.2mA at 5V
TTL compatible
All registers store BCD format
HT1380: 8-pin DIP package
HT1381: 8-pin SOP package
-
VIH: 2.0V~VDD+0.3V at VDD=5V
VIL: -0.3V~+0.8V at VDD=5V
-
Applications
·
Microcomputer serial clock
·
Clock and Calendar
General Description
The HT1380/HT1381 is a serial timekeeper IC
which provides seconds, minutes, hours, day,
date, month and year information. The number
of days in each month and leap years are auto-
matically adjusted. The HT1380/HT1381 is de-
signed for low power consumption and can
operate in two modes: one is the 12-hour mode
with an AM/PM indicator, the other is the
24-hour mode.
The HT1380/HT1381 has several registers to
store the corresponding information with 8-bit
data format. A 32768Hz crystal is required to
provide the correct timing. In order to minimize
the pin number, the HT1380/HT1381 use a se-
rial I/O transmission method to interface with a
microprocessor. Only three wires are required:
(1) REST, (2) SCLK and (3) I/O. Data can be de-
livered 1 byte at a time or in a burst of up to 8
bytes.
Block Diagram
Pin Assignment
N
C
1
2
3
4
V
S
I
R
D
C
D
N
C
1
2
3
4
V
S
I
R
D
C
D
8
7
6
5
8
7
6
5
D
a
t
a
S
h
i
f
R
t
e
a
l
T
i
m
e
I
/
O
X
X
1
2
X
X
1
2
L
K
L
K
R
e
g
i
s
t
e
r
C
l
o
c
k
S
C
L
K
/
O
/
O
V
S
S
V
S
S
E
S
T
E
S
T
O
s
c
i
l
l
a
t
o
r
a
n
d
H
T
1
3
8
0
H
T
1
3
8
1
C
o
m
m
a
n
d
X
X
1
2
R
E
S
T
D
i
v
c
i
d
e
r
C
o
n
t
r
o
l
L
o
g
i
8
D
I
P
8
S
O
P
C
i
r
c
u
i
t
1
October 2, 1999
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全部评论(2)
2022-09-06 09:50:46MZYA
打卡怎么是乱码呢
2022-03-04 13:53:08杨义
感觉不错