CDP68HC68T1 Datasheet PDF - GE
| Part Number | CDP68HC68T1 | |
| Description | CMOS Real-Time Clock | |
| Manufacturers | GE | |
| Logo |  |
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CMOS Peripherals _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _""-
CDP68HC68T1
Advance Information
eLK OUT
CPUR
INT
SCK
"'CSI
MISO
CE
VSS
16 Voo
15 XTAL OUT
3 14 XTAL IN
4 13 V BATT
5 12 vSYS
6 II LINE
10 PaR
8 9 PSE
TOP VIEW
92CS-380~3
TERMINAL
ASSIGNMENT
CMOS Real-Time Clock with
RAM and Power Sense/Control
Feature.:
• SPI (Serial Peripheral Interface)
• Full clock features: sec., min., hrs.
(12/24, AM/PM), day of week,
date, month, year, (0-99), auto
leap year
• 32-word x 8-bit RAM
• Seconds, minutes, hours alarm
• Automatic power loss detection
• Minimum standby (timekeeping)
voltages: 2.2 volts
• Selectable crystal or 50/60-Hz line input
• Buffered clock output
• Battery input pin that powers oscillator
and also connects to the Voo pin when
main power fails
• Three independent interrupt modes:
alarm, periodic or power-down sense
The COPS8HCS8T1, real-time clock provides a time/calen-
dar function, a 32 byte static RAM and a 3-wire serial
peripheral interface (SPI bus). The primary function of the
clock is to divide down a frequency input that can be
supplied by the on-board oscillator in conjunction with an
external crystal or by an external clock source. Th~ clock
either operates with a 32+kHz, 1+MHz, 2+MHz or 4+MHz
crystal or it can be driven by an external clock source atthe
same frequencies. In addition, the frequency can be selected
to allow operation from a 50 or SO-Hz input. The time
registers furnish seconds, minutes, and hours data while
the calendar registers offer day of week, date, month and
year information. The data In the time/calendar registers is
in BCD format. In addition, 12 or 24-hour operation can be
selected with an AM-PM Indicator available in the 12-hour
mode. The T1 has a separate clock output that supplies one
of 7 selectable frequencies.
Computer handshaking is established with a "wired or"
interrupt output. The interrupt can be activated by anyone
of three separate internal sources. The first is an alarm
circuit that consists of seconds, minutes and hours alarm
latches that trigger the interrupt when they are in coinci-
dence with the value in the seconds, minutes and hours time
counters. The second interrupt source Is one of 15 periodic
signals that range from subsecond to daily Intervals. The
final Interrupt source is from the power-sense circuitthat is
used with the LINE input pin to monitor power failures. Two
other pins, the power supply enable (PSE) output and the
Vsys input are used for external power control. The CPUR
reset output pin is available for power-down operation and
is activated under software control. CPUR Is also activated
by a watchdog circuit that if enabled requires the CPU to
toggle the CE pin periodically without a serial data transfer.
The COPS8HCS8T1 Is available in a 1S-lead hermetiC dual-
in-line ceramic package (0 suffix), in a 1S-lead dual-in-line
plastic package (E suffix), and in a 20-lead small-outline
plastic package (M suffix).
MAXIMUM RATINGS. Absolute-Maximum Values:
DC SUPPLY-VOLTAGE RANGE, (Voo)
(Voltage referenced to V•• terminal) ....................................................................................-0.5 to +7 V
INPUT VOLTAGE RANGE, ALL INPUTS EXCEPT LINE .....•••••••.........••...•.••.•..•••........••••••..••...•• -0.5 to Voo +0.5 V
V••• S Voc + 1.5 V
DC INPUT CURRENT. ANY ONE INPUT (LINE INPUT, -10 mAl ............................................................ ± 10 mA
POWER DISSIPATION PER PACKAGE (Po):
For TA = -40 to +60· C (PACKAGE TYPE E) ............................................................................... 500 mW
For TA =+60 to +85·C (PACKAGE TYPE E) ................................................. Derate Linearly at 12 mW/·C to 200 mW
For T. =-55 to +100·C (PACKAGE TYPE D) .............................................................................. 500 mW
For T. =+100 to +125·C (PACKAGE TYPE D) .............................................. Derate Linearly at 12 mW/·C to 200 mW
ForTA =-40· to +70·C (PACKAGE TYPE M)' .:.......................................................................... 400 mW
ForTA =+70· to +85·C (PACKAGE TYPE M)· ............................................ ·· Derate linearly at 6.0 mW/·C to 310 mW
DEVICE DISSIPATION PER OUTPUT TRANSISTOR
For TA =FULL PACKAGE-TEMPERATURE RANGE (All Package Types) .................................................... 40 mW
OPERATING-TEMPERATURE RANGE (T.):
PACKAGE TYPE D ............................................................................................... -55 to +125· C
PACKAGE TYPE E and M .......................................................................................... -40 to +85·C
STORAGE-TEMPERATURE RANGE (T...) ........................................................................... -65 to +150·C
LEAD TEMPERATURE (DURING SOLDERING):
At distance 1/16 ± 1132 In. (1.59 ± 0.79 mm) from case for 10 s max. .. ................................................... +265· C
• Printed-circuit board mount: 57 mm x 57 mm minimum area x 1.6 mm thick G1 0 epoxy glass. or equivalent
File Number 1547
542 ______________________________________________________
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CMOS Peripherals _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
CDP68HC68T1
PROGRAMMERS MODEL - CLOCK REGISTERS
I IHEX ADDRESS
WRITE/READ REGISTERS
DB7
DBO
NAME
SECONDS (00-59)---
20
TENS 0-5
21
12 PM/AM
22
HR. X TENS 0-2
24
X X XX
23
TENS 0-3
24
25
DB7,1 = 12 HR, 0 = 24 HR
DB5 =1 PM,O =AM
HOURS (01-12 OR 00-23)
SUNDAY = 1
DAY OF WK (01-07) - - -
01-28
(DATE)
DAY OF
MONTH
(
2
9~~) -
JAN = 1
MONTH (01-12)- DEC = 12-
26
7
31
YEARS (00-99) - - - -
CONTROL-----
7
32
INTERRUPT-----
WRITE ONLY REGISTERS
28
TENS 0-5
UNITS 0-9
ALARM SECONDS (00-59) -
29
TENS 0-5
UNITS 0-9
ALARM MINUTES (00-59)-
ALARM HOURS (01-12 or 00-23)
2A
PLUS AM/PM IN 12 HR. MODE
PM = 1, AM = 0
READ ONLY REGISTER
30 STATUS
NOTE: X = DON'T CARE WRITES r---------::-:::-------------
X = 0 WHEN READ
7 6 5 BIT4 3 2 1 0
RAM DATA BYTE
07 1 06 1 OS 1 04 103 1 02 101 1 DO I
HEX ADDRESS 00-1F
82CM·31011
546 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ____
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CDP68HC68T1 electronic component. |
| Information | Total 18 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CDP68HC68T1.PDF Datasheet ] | |
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