ICM7170 Intersil Corporation, ICM7170 Datasheet - Page 7

• Manufacturer Part Number: ICM7170
• Description: Microprocessor-compatible, Real-time Clock
• Manufacturer: Intersil Corporation

NOTES:
Addresses 10010 to 11111 (12h to 1Fh) are unused.
‘+’ Unused bit for interrupt Mask Register, MSB bit for interrupt Status Register.
‘-’ Indicates unused bits.
‘
‘M’ Alarm compare for particular counter will be enabled if bit is set to logic “0”.
†
Periodic and Alarm Flags
A4
’ AM/PM indicator bit in 12 hour format Logic “0” indicates AM, logic “1” indicates PM.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
GLOBAL INTERRUPT
NOT USED
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
D7
D7
A2
ADDRESS
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
Al
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
INTERRUPT STATUS REGISTER ADDRESS (10000b, 10h) READ-ONLY
INTERRUPT MASK REGISTER ADDRESS (10000b, 10h) WRITE-ONLY
DAY
DAY
D6
D6
HEX
0C
0D
0A
0B
0E
0F
00
01
02
03
04
05
06
07
08
09
10
11
TABLE 4. INTERRUPT AND STATUS REGISTERS FORMAT
TABLE 3. ADDRESS CODES AND FUNCTIONS
Counter-1/100 seconds
Counter-hours
Counter-minutes
Counter-seconds
Counter-month
Counter-date
Counter-year
Counter-day of week
RAM-1/100 seconds
RAM-hours
RAM-minutes
RAM-seconds
RAM-month
RAM-date
RAM-year
RAM-day of week
Interrupt Status and Mask
Register
Command register
HOUR
HOUR
D5
D5
12 Hour Mode
12 Hour Mode
FUNCTION
Periodic Interrupt Mask Bits
Periodic Interrupt Flags
MIN
MIN
D4
D4
ICM7170
12-11
SEC
SEC
D3
D3
D7
M
M
M
M
M
M
M
†
†
+
-
-
-
-
-
-
-
-
-
-
D6
M
M
1/10 SEC
1/10 SEC
-
-
-
-
-
-
-
-
-
-
-
-
-
D2
D2
D5
-
-
-
-
-
-
-
.
.
-
-
-
D4
-
-
-
-
.
.
-
-
DATA
1/100 SEC
1/100 SEC
D1
D1
D3
-
-
D2
Alarm/Compare Mask Bit
Alarm Compare Flag
D1
ALARM
ALARM
D0
D0
D0
VALUE
0 - 99
0 - 23
1 - 12
0 - 59
0 - 59
1 - 12
1 - 31
0 - 99
0 - 99
0 - 23
1 - 12
0 - 59
0 - 59
1 - 12
1 - 31
0 - 99
0 - 6
0 - 6