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參數(shù)資料
| 型號： | BQ4802LYDWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | XO, clock |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 481K |
| 代理商： | BQ4802LYDWR |
bq4802Y
bq4802LY
SLUS464C – AUGUST 2000 – REVISED JUNE 2002
www.ti.com
12
FUNCTIONAL DESCRIPTION
The following sections describe the bq4802Y/bq4802LY functional operation including clock interface, data-retention
modes, power-on reset timing, watchdog timer activation, and interrupt generation.
Table 1. Operational Truth Table
VCC
CS
OE
WE
CEOUT
VOUT
MODE
DQ
POWER
< VCC(MAX)
VIH
X
CEIN
VOUT1
Deselect
High Z
Standby
CC(MAX)
VIL
X
VIL
CEIN
VOUT1
Write
DIN
Active
> VCC(MIN)
VIL
VIH
CEIN
VOUT1
Read
DOUT
Active
CC(MIN)
VIL
VIH
CEIN
VOUT1
Read
High-Z
Active
<VPFD(MIN>VSO
X
VOH
VOUT1
Deselect
High-Z
CMOS standby
≤ VSO
X
VOHB
VOUT2
Deselect
High-Z
Battery-backup mode
ADDRESS MAP
Thebq4802Y/bq4802LY provides 16 bytes of clock and control status registers. Table 1 is a map of the bq4802Y/bq4802LY
registers, and Table 2 describes the register bits.
Table 2. Clock and Control Register Map
Addr
(h)
D7
D6
D5
D4
D3
D2
D1
D0
Range (h)
Register
0
10-second digit
1-second digit
00–59
Seconds
1
ALM1
ALM0
1 second digit
00 59
Seconds alarm
1
ALM1
10-second digit
1-second digit
00–59
Seconds alarm
2
0
10-minutedigit
1-minute digit
00–59
Minutes
3
ALM1
ALM0
1 minute digit
00 59
Minutes alarm
3
ALM1
10-minutedigit
1-minute digit
00–59
Minutes alarm
4
PM/AM
0
10-hour digit
1-hour digit
01–12AM
81–92PM
Hours
5
ALM1
ALM0
10 hour digit
1 hour digit
01–12AM
Hours alarm
5
PM/AM
ALM0
10-hour digit
1-hour digit
01–12AM
81–92PM
Hours alarm
6
0
10-day digit
1-day digit
01–31
Day
7
ALM1
ALM0
10-day digit
1-day digit
01–31
Day alarm
8
0
day of week digit
01–07
Day of Week
9
0
10 mo.
1-month digit
01–12
Month
A
10-year digit
1-year digit
00–99
Year
B
(1)
WD2
WD1
WD0
RS3
RS2
RS1
RS0
–
Rates
C
(1)
AIE
PIE
PWRIE
ABE
–
Enables
D
(1)
AF
PF
PWRF
BVF
–
Flags
E
(1)
UTI
STOP
24/12
DSE
–
Control
F
10-century digit
1-century digit
00–99
Century
(1) Unused bits; cannot be written to and read as 0.
(2) Internal write-protection period after VCC passes VPFD on power up.
(3) Clock calendar data in BCD. Automatic leap year adjustment up to year 2100.
(4) PM/AM = 1 for PM and 0 for AM.
(5) DSE = 1 to enable daylight savings adjustment.
(6) 24/12 = 1 to enable 24–hour data representation and 0 for 12–hour data representation.
(7) Day of week coded as Sunday = 1 through Saturday = 7
(8) BVF = 1 for valid BC input
(9) STOP = 1 to turn the RTC on and 0 stops the RTC in battery-backup mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ4802LYDWRG4 | 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPW | 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPWG4 | 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPWR | 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPWRG4 | 功能描述:實時時鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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