CDP68HC68T1E Intersil, CDP68HC68T1E Datasheet - Page 12

• Manufacturer Part Number: CDP68HC68T1E
• Description: IC RTC 32X8 NVSRAM CMOS 16-DIP
• Manufacturer: Intersil
• Type: Clock/Calendar/NVSRAMr

Specifications of CDP68HC68T1E

• Memory Size: 32B
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 3 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Alarm
The output of the alarm comparator is enabled when this bit
is set high. When a comparison occurs between the
seconds, minutes and hours time and alarm counters, the
interrupt output is activated. When loading the time counters,
this bit should be set low to avoid a false interrupt. This is not
required when loading the alarm counters. See "Functional
Description", INT for explanation of alarm delay on page 10.
CLOCK CONTROL REGISTER (Write/Read) - Address 31H
INTERRUPT CONTROL REGISTER (Write/Read) - Address 32H
NOTE: All bits are reset by power-on reset.
WATCHDOG
START
STOP
D0 - D3 VALUE
D7
D7
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
POWER
DOWN
XTAL
LINE
D6
D6
12
PERIODIC INTERRUPT
OUTPUT FREQUENCY
POWER
SENSE
XTAL
SEL
D5
D5
1
50Hz or 60Hz
TABLE 3. PERIODIC INTERRUPT OUTPUT
2048Hz
1024Hz
Disable
Minute
512Hz
256Hz
128Hz
64Hz
32Hz
16Hz
Hour
8Hz
4Hz
2Hz
1Hz
Day
ALARM
CDP68HC68T1
XTAL
SEL
D4
D4
0
Periodic Select
The value in these 4 bits will select the frequency of the
periodic output. (See Table 3).
50Hz
60Hz
D3
D3
XTAL
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
CLK OUT
FREQUENCY TIME BASE
D2
D2
PERIODIC SELECT
2
CLK OUT
D1
D1
1
LINE
X
X
X
X
X
X
CLK OUT
D0
D0
October 29, 2007
0
FN1547.8