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參數(shù)資料
| 型號(hào)： | M48TMH1TR |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 5V PC REAL TIME CLOCK |
| 中文描述： | 5V的電腦實(shí)時(shí)時(shí)鐘 |
| 文件頁數(shù)： | 1/23頁 |
| 文件大?。?/td> | 163K |
| 代理商： | M48TMH1TR |
1/23
May 2000
M48T86
5V PC REAL TIME CLOCK
I
DROP-IN REPLACEMENT for PC
COMPUTER CLOCK/CALENDAR
I
COUNTS SECONDS, MINUTES, HOURS,
DAYS, DAY of the WEEK, DATE, MONTH and
YEAR with LEAP YEAR COMPENSATION
I
INTERFACED WITH SOFTWARE AS 128
RAM LOCATIONS:
– 14 Bytes of Clock and Control Registers
– 114 Bytes of General Purpose RAM
I
SELECTABLE BUS TIMING (Intel/Motorola)
I
THREE INTERRUPTS are SEPARATELY
SOFTWARE-MASKABLE and TESTABLE
– Time-of-Day Alarm (Once/Second to
Once/Day)
– Periodic Rates from 122μs to 500ms
– End-of-Clock Update Cycle
I
PROGRAMMABLE SQUARE WAVE OUTPUT
I
SELF-CONTAINED BATTERY and CRYSTAL
in the CAPHAT DIP PACKAGE
I
PACKAGING INCLUDES a 28-LEAD SOIC
and SNAPHAT
TOP
(to be Ordered Separately)
I
SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT TOP
CONTAINS the BATTERY and CRYSTAL
I
PIN and FUNCTION COMPATIBLE with
bq3285/7A and DS128887
Figure 1. Logic Diagram
AI01640
E
VCC
M48T86
RCL
RST
VSS
8
AD0-AD7
MOT
R/W
DS
AS
IRQ
SQW
28
1
24
1
SOH28 (MH)
SNAPHAT (SH)
Battery/Crystal
PCDIP24 (PC)
Battery/Crystal
CAPHAT
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