- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359066 > M48T59YSH (意法半導(dǎo)體) Hook-Up Wire; Conductor Size AWG:24; No. Strands x Strand Size:Solid; Jacket Color:Green; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1061; CSA AWM; Conductor Material:Copper; Jacket Material:Polyvinylchloride (PVC) RoHS Compliant: Yes PDF資料下載
參數(shù)資料
| 型號： | M48T59YSH |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Hook-Up Wire; Conductor Size AWG:24; No. Strands x Strand Size:Solid; Jacket Color:Green; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1061; CSA AWM; Conductor Material:Copper; Jacket Material:Polyvinylchloride (PVC) RoHS Compliant: Yes |
| 中文描述： | 64千位8KB的x8 SRAM的計時器 |
| 文件頁數(shù)： | 10/21頁 |
| 文件大小： | 168K |
| 代理商： | M48T59YSH |
M48T59, M48T59Y, M48T59V
10/21
condition reset will not occur unless the addresses
are stable at the flag location for at least 15ns
while the divice is in the read mode as shown in
Figure 11.
The IRQ/FT pin is an open drain output and re-
quires a pull-up resistor (10k
recommended) to
V
CC
. The pin remains in the high impedance state
unless an interrupt occurs or the frequency test
mode is enabled.
CLOCK OPERATIONS
Reading the Clock
Updates to the TIMEKEEPER registers should be
halted before clock data is read to prevent reading
data in transition. Because the BiPORT TIME-
KEEPER cells in the RAM array are only data reg-
isters, and not the actual clock counters, updating
the registers can be halted without disturbing the
clock itself.
Updating is halted when a ’1’ is written to the
READ bit, D6 in the Control register (1FF8h). As
long as a ’1’ remains in that position, updating is
halted.
After a halt is issued, the registers reflect the
count; that is, the day, date, and the time that were
current at the moment the halt command was is-
sued.
All of the TIMEKEEPER registers are updated si-
multaneously. A halt will not interrupt an update in
progress. Updating is within a second after the bit
is reset to a ’0’.
Setting the Clock
Bit D7 of the Control register (1FF8h) is the
WRITE bit. Setting the WRITE bit to a ’1’, like the
READ bit, halts updates to the TIMEKEEPER reg-
during the time the device is sampling V
CC
. There-
fore, decoupling of the power supply lines is rec-
ommended.
When V
CC
drops below V
SO
, the control circuit
switches power to the internal battery which pre-
serves data and powers the clock. The internal
button cell will maintain data in the M48T59/59Y/
59V for an accumulated period of at least 7 years
when V
CC
is less than V
SO
. As system power re-
turns and V
CC
rises above V
SO
, the battery is dis-
connected, and the power supply is switched to
external V
CC
. Deselect continues for t
REC
after
V
CC
reaches V
PFD
(max).
For more information on Battery Storage Life refer
to the Application Note AN1012.
POWER-ON RESET
The M48T59/59Y/59V continuously monitors V
CC
.
When V
CC
falls to the power fail detect trip point,
the RST pulls low (open drain) and remains low on
power-up for 40ms to 200ms after V
CC
passes
V
PFD
. RST is valid for all V
CC
conditions. The RST
pin is an open drain output and an appropriate re-
sistor to V
CC
should be chosen to control rise time.
PROGRAMMABLE INTERRUPTS
The M48T59/59Y/59V provides two programma-
ble interrupts; an alarm and a watchdog. When an
interrupt condition occurs, the M48T59/59Y/59V
sets the appropriate flag bit in the flag register
1FF0h. The interrupt enable bits in (AFE and ABE)
in 1FF6h and the Watchdog Steering (WDS) bit in
1FF7h allow the interrupt to activate the IRQ/FT
pin.
The interrupt flags and the IRQ/FT output are
cleared by a read to the flags register. An interrupt
Figure 9. Clock Calibration
AI00594B
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48T59VMH | 64 Kbit 8Kb x8 TIMEKEEPER SRAM |
| M48T59PC | 64 Kbit 8Kb x8 TIMEKEEPER SRAM |
| M48T59V-70MH6TR | 64 Kbit 8Kb x8 TIMEKEEPER SRAM |
| M48T59V-70PC1 | 64 Kbit 8Kb x8 TIMEKEEPER SRAM |
| M48T59V-70PC1TR | 64 Kbit 8Kb x8 TIMEKEEPER SRAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T86 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V PC real-time clock |
| M48T86_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V PC real-time clock |
| M48T86_0707 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V PC real-time clock |
| M48T86MH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V PC REAL TIME CLOCK |
| M48T86MH1 | 功能描述:實時時鐘 USE 511-M48T86MH1E 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。