参数资料
型号: PT7C4311WEX
厂商: Pericom
文件页数: 13/17页
文件大小: 0K
描述: IC RTC LEAP YEAR Y2K 8SOIC
标准包装: 1
类型: 时钟/日历
特点: 闰年,方波输出,Y2K
存储容量: 56B
时间格式: HH:MM:SS(24 小时)
数据格式: YY-MM-DD-dd
接口: I²C,2 线串口
电源电压: 1.2 V ~ 5.5 V
电压 - 电源,电池: 2 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 标准包装
其它名称: PT7C4311WEXDKR
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PT0322(08/09)
Ver: 2
5
Data Sheet
PT7C4311
Real-time Clock Module (I
2C Bus)
Registers
1.
Allocation of registers
Register definition
Addr.
(hex) *1
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00
Seconds (00-59)
ST*2
S40
S20
S10
S8
S4
S2
S1
01
Minutes (00-59)
×
M40
M20
M10
M8
M4
M2
M1
02
Hours (00-23)
CEB*3
CB*3
H20
H10
H8
H4
H2
H1
03
Days of the week (01-07)
×
W4
W2
W1
04
Dates (01-31)
×
D20
D10
D8
D4
D2
D1
05
Months (01-12)
×
×*8
MO10
MO8
MO4
MO2
MO1
06
Years (00-99)
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
07
Control*3
OUT*4
FT*5
S*6
Calibration*7
08~3F
RAM
×
Caution points:
*1. PT7C4311 uses 3 bits for address. That is if write data to 08H, the data will be written to 00H address register.
*2. Stop bit. When this bit is set to 1, oscillator and time count chain are both stopped.
*3. CEB: Century Enable Bit. CB: Century Bit.
*4. Control FT/OUT pin output DC level when 512Hz square wave is disabled.
*5. Frequency Test. 512Hz square wave output is enabled at FT/OUT pin, which is using for frequency test.
*6. Sign Bit. “1” indicates positive calibration; “0”indicates negative calibration.
*7. Using for modifying count frequency. If 20ppm is wanted to slow down the count frequency, 10 (01010) should be loaded.
Calibration will not affect FT/OUT output frequency.
*8. Don’t care.
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