ICM7170 Datasheet, PDF (7/13 Pages) Intersil Corporation – Microprocessor-Compatible, Real-Time Clock

ICM7170
TABLE 3. ADDRESS CODES AND FUNCTIONS
ADDRESS
A4 A3 A2 Al A0 HEX
FUNCTION
00000
00 Counter-1/100 seconds
00001
01 Counter-hours
12 Hour Mode
DATA
D7 D6 D5 D4 D3 D2 D1 D0 VALUE
-
0 - 99
-
-
-
0 - 23
†^{- - -}
1 - 12
00010
00011
00100
00101
00110
00111
01000
01001
02 Counter-minutes
03 Counter-seconds
04 Counter-month
05 Counter-date
06 Counter-year
07 Counter-day of week
08 RAM-1/100 seconds
09 RAM-hours
12 Hour Mode
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
M
-M-
†^{M - -}
0 - 59
0 - 59
1 - 12
1 - 31
0 - 99
0-6
0 - 99
0 - 23
1 - 12
01010
0A RAM-minutes
M-
.
.
01011
0B RAM-seconds
M-
.
.
0
1
1
0
0
0C RAM-month
M-
-
-
0
1
1
0
1
0D RAM-date
M-
-
01110
0E RAM-year
M
01111
0F RAM-day of week
M-
-
-
-
10000
10 Interrupt Status and Mask +
Register
10001
11 Command register
-
-
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.
‘†’ AM/PM indicator bit in 12 hour format Logic “0” indicates AM, logic “1” indicates PM.
‘M’ Alarm compare for particular counter will be enabled if bit is set to logic “0”.
0 - 59
0 - 59
1 - 12
1 - 31
0 - 99
0-6
TABLE 4. INTERRUPT AND STATUS REGISTERS FORMAT
INTERRUPT MASK REGISTER ADDRESS (10000b, 10h) WRITE-ONLY
D7
D6
D5
D4
D3
D2
D1
D0
NOT USED
DAY
HOUR
MIN
SEC
1/10 SEC 1/100 SEC
ALARM
←
Periodic Interrupt Mask Bits
→
Alarm/Compare Mask Bit
INTERRUPT STATUS REGISTER ADDRESS (10000b, 10h) READ-ONLY
D7
D6
D5
D4
D3
D2
D1
D0
GLOBAL INTERRUPT
DAY
HOUR
MIN
SEC
1/10 SEC 1/100 SEC
ALARM
Periodic and Alarm Flags ←
Periodic Interrupt Flags
→ Alarm Compare Flag
12-11