12-11

TABLE 3. ADDRESS CODES AND FUNCTIONS

ADDRESS

FUNCTION

DATA

VALUE

A4

A3

A2

Al

A0

HEX

D7

D6

D5

D4

D3

D2

D1

D0

00000

00

Counter-1/100 seconds

-

0 - 99

00001

01

Counter-hours

-

-

-

0 - 23

12 Hour Mode

†

-

-

-

1 - 12

00010

02

Counter-minutes

-

-

0 - 59

00011

03

Counter-seconds

-

-

0 - 59

00100

04

Counter-month

----

1 - 12

00101

05

Counter-date

-

-

-

1 - 31

00110

06

Counter-year

-

0 - 99

00111

07

Counter-day of week

-----

0 - 6

01000

08

RAM-1/100 seconds

M

0 - 99

01001

09

RAM-hours

-

M

-

0 - 23

12 Hour Mode

†

M

-

-

1 - 12

01010

0A

RAM-minutes

M

-

.

.

0 - 59

01011

0B

RAM-seconds

M

-

.

.

0 - 59

01100

0C

RAM-month

M

-

-

-

1 - 12

01101

0D

RAM-date

M

-

-

1 - 31

01110

0E

RAM-year

M

0 - 99

01111

0F

RAM-day of week

M

----

0 - 6

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.

‘

‘M’ Alarm compare for particular counter will be enabled if bit is set to logic “0”.

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

ICM7170