參數(shù)資料
型號(hào): PT7C4302WEX
廠商: Pericom
文件頁(yè)數(shù): 12/13頁(yè)
文件大小: 0K
描述: IC RTC NVSRAM 8SOIC
標(biāo)準(zhǔn)包裝: 1
類型: 時(shí)鐘/日歷
特點(diǎn): 閏年,NVSRAM,方波輸出,涓流充電器
存儲(chǔ)容量: 31B
時(shí)間格式: HH:MM:SS(12/24 小時(shí))
數(shù)據(jù)格式: YY-MM-DD-dd
接口: 3 線串口
電源電壓: 1.2 V ~ 5.5 V
電壓 - 電源,電池: 1.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: PT7C4302WEXDKR
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12-07-0001
PT0225-4
07/04/12
8
PT7C4302
Real-time Clock Module (3-wire Interface)
2.
Control and status register
Addr.
(hex)
Description
D7
D6
D5
D4
D3
D2
D1
D0
07
Control
WP
0
(default)
0
WP: Write Protect bit.
WP
Data
Description
Read / Write
0
Write operation is enabled.
Default
1
Prevent a write operation to any other register.
3.
Time Counter
Time digit display (in BCD code):
Second digits: Range from 00 to 59 and carried to minute digits when incremented from 59 to 00.
Minute digits: Range from 00 to 59 and carried to hour digits when incremented from 59 to 00.
Hour digits: See description on the /12, 24 bit. Carried to day and day-of-the-week digits when incremented from 11 p.m. to
12 a.m. or 23 to 00.
Addr.
(hex)
Description
D7
D6
D5
D4
D3
D2
D1
D0
00
Seconds
/EOSC
*
S40
S20
S10
S8
S4
S2
S1
(default)
0
Undefined
01
Minutes
0
M40
M20
M10
M8
M4
M2
M1
(default)
0
Undefined
02
Hours
12, /24
0
H20 or P,/A
H10
H8
H4
H2
H1
(default)
Undefined
0
Undefined
* Note: /EOSC bit must be written into 0 to start the time count.
a)
12 / 24 bit
This bit is used to select between 12-hour clock operation and 24-hour clock operation.
12, /24
Description
Hours register
0
24-hour time display
1
12-hour time display
Be sure to select between 12-hour and 24-hour clock operation before writing the time data.
24-hour clock
12-hour clock
24-hour clock
12-hour clock
00
92 ( AM 12)
12
B2 ( PM 12 )
01
81 ( AM 01 )
13
A1 ( PM 01 )
02
82 ( AM 02 )
14
A2 ( PM 02 )
03
83 ( AM 03 )
15
A3 ( PM 03 )
04
84 ( AM 04 )
16
A4 ( PM 04 )
05
85 ( AM 05 )
17
A5 ( PM 05 )
06
86 ( AM 06 )
18
A6 ( PM 06 )
07
87 ( AM 07 )
19
A7 ( PM 07 )
08
88 ( AM 08 )
20
A8 ( PM 08 )
09
89 ( AM 09 )
21
A9 ( PM 09 )
10
90 ( AM 10 )
22
B0 ( PM 10 )
11
91 ( AM 11 )
23
B1 ( PM 11 )
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