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参数资料
| 型号： | M48T212V-70MH6 |
| 厂商： | STMICROELECTRONICS |
| 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, PDSO44 |
| 封装： | SNAPHAT, PLASTIC, SO-44 |
| 文件页数： | 7/23页 |
| 文件大小： | 150K |
| 代理商： | M48T212V-70MH6 |
15/23
M48T212Y, M48T212V
VCC SWITCH OUTPUT
Vccsw output goes low when VOUT switches to
VCC turning on a customer supplied P-Channel
MOSFET
(see
Figure
3).
The
Motorola
MTD20P06HDL is recommended. This MOSFET
in turn connects VOUT to a separate supply when
the current requirement is greater than IOUT1 (see
Tables 7A and 7B). This output may also be used
simply to indicate the status of the internal battery
switchover comparator, which controls the source
(VCC or battery) of the VOUT output.
POWER-ON RESET
The M48T212Y/V continuously monitors VCC.
When VCC falls to the power fail detect trip point,
the RST pulls low (open drain) and remains low on
power-up for 40 to 200ms after VCC passes VPFD.
The RST pin is an open drain output and an appro-
priate pull-up resistor to VCC should be chosen to
control rise time.
Note: If the RST output is fed back into either of
the RSTIN inputs (for a microprocessor with a bi-
directional reset) then a 1k
(max) pull-up resistor
is recommended.
Reset Inputs (RSTIN1 & RSTIN2)
The M48T212Y/V provides two independent in-
puts which can generate an output reset. The du-
ration and function of these resets is identical to a
reset generated by a power cycle. Table 14 and
Figure 12 illustrate the AC reset characteristics of
this function. During the time RST is enabled
(tR1HRH &tR2HRH), the Reset Inputs are ignored.
Note: RSTIN1 and RSTIN2 are each internally
pulled up to VCC through a 100K resistor.
Table 13. TIMEKEEPER Register Map
Address
Function/Range
BCD Format
D7
D6
D5
D4
D3
D2
D1
D0
Fh
10 Years
Year
00-99
Eh
0
10M
Month
01-12
Dh
0
10 Date
Date: Day of Month
Date
01-31
Ch
0
FT
0
Day of Week
Day
01-7
Bh
0
10 Hours
Hours (24 Hour Format)
Hour
00-23
Ah
0
10 Minutes
Minutes
Min
00-59
9h
ST
10 Seconds
Seconds
Sec
00-59
8h
W
R
S
Calibration
Control
7h
WDS
BMB4
BMB3
BMB2
BMB1
BMB0
RB1
RB0
Watchdog
6h
AFE
0
ABE
Al 10M
Alarm Month
A Month
01-12
5h
RPT4
RPT5
AI 10 Date
Alarm Date
A Date
01-31
4h
RPT3
0
AI 10 Hour
Alarm Hour
A Hour
00-23
3h
RPT2
Alarm 10 Minutes
Alarm Minutes
A Min
00-59
2h
RPT1
Alarm 10 Seconds
Alarm Seconds
A Sec
00-59
1h
1000 Year
100 Year
Century
00-99
0h
WDF
AF
Y
BL
Y
Flag
Keys:
S = Sign Bit
FT = Frequency Test Bit
R = Read Bit
W = Write Bit
ST = Stop Bit
0 = Must be set to zero
BL = Battery Low Flag
BMB0-BMB4 = Watchdog Multiplier Bits
AFE = Alarm Flag Enable Flag
RB0-RB1 = Watchdog Resolution Bits
WDS = Watchdog Steering Bit
ABE = Alarm in Battery Back-Up Mode Enable Bit
RPT1-RPT5 = Alarm Repeat Mode Bits
WDF = Watchdog flag
AF = Alarm flag
Y = ‘1’ or ‘0’
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T212V-70MH6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH6TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH1 | 功能描述:监控电路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| M48T212V-85MH1E | 功能描述:监控电路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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