CDP68HC68T1M Intersil, CDP68HC68T1M Datasheet - Page 6

• Manufacturer Part Number: CDP68HC68T1M
• Description: IC RTC 32X8 NVSRAM CMOS 20-SOIC
• Manufacturer: Intersil
• Type: Clock/Calendar/NVSRAMr

Specifications of CDP68HC68T1M

• 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: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

NOTES:
4. Example: 3:49:18, Tuesday. Oct. 29,1985.
5. Most significant Bit, D7, is “0” for 24 hours, and “1” for 12 hour mode. Data Bit D5 is “1” for PM and ‘0” for AM in 12 hour mode.
6. Alarm hours. Data Bit D5 is “1” for PM and “0” for AM in 12 hour mode. Data Bits D7 and D6 are DON’T CARE.
ADDRESS LOCATION (H)
R = READABLE
31
32
50
51
63
85
20
21
22
23
24
25
26
28
29
2A
0
32 RAM LOCATIONS
CLOCK/CALENDAR
13 BYTES UNUSED
TEST MODE
Seconds
Minutes
Hours
12 Hour Mode
(Note 5)
Hours
24 Hour Mode
Day of the Week
(Sunday = 1)
Day of the Month
(Date)
Month
Jan = 1, Dec = 12
Years
Alarm Seconds
Alarm Minutes
Alarm Hours (Note 6)
12 Hour Mode
Alarm Hours
24 Hour Mode
W = WRITABLE
6
FUNCTION
TABLE 1. CLOCK/CALENDAR AND ALARM DATA MODES
$00
$1F
$20
$32
$33
$3F
$55
FIGURE 2. ADDRESS MAP
CDP68HC68T1
DECIMAL RANGE
0 to 59
0 to 59
1 to 12
0 to 23
1 to 31
1 to 12
0 to 99
0 to 59
0 to 59
1 to 12
0 to 23
1 to 7
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
SECONDS
MINUTES
HOURS
DAY OF WEEK
DATE
MONTH
YEARS
NOT USED
SEC ALARM
MIN ALARM
HRS ALARM
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
STATUS REGISTER
CONTROL REGISTER
INTERRUPT CONTROL REGISTER
BCD DATA RANGE
A1 to B2 (PM)
81 to 92 (AM)
01 to 12 (AM)
21 to 32 (PM)
00 to 59
00 to 59
00 to 23
01 to 07
01 to 31
01 to 12
00 to 99
00 to 59
00 to 59
00 to 23
R, W
R, W
R, W
R, W
R, W
R, W
R, W
R, W
R, W
BCD DATE EXAMPLE
W
W
W
R
$2A
$2B
$2C
$2D
$2E
$2F
(Note 4)
$20
$21
$22
$23
$24
$25
$26
$27
$28
$29
$30
$31
$32
18
49
A3
15
03
29
10
85
18
49
23
15
October 29, 2007
FN1547.8