MC68HC68 データシートの表示（PDF） - Motorola => Freescale

部品番号

コンポーネント説明

メーカー

MC68HC68

Real-Time Clock plus RAM with Serial Interface

Motorola => Freescale 

HEX ADDRESS

READ

WRITE DB7

$20

$A0

READ/WRITE REGISTERS

FUNCTION

DB0

TENS 0 – 5

UNITS 0 – 9

SECONDS (00 – 59)

$21

$A1

TENS 0 – 5

UNITS 0 – 9

MINUTES (00 – 59)

$22

$A2

12

HR

24

PM/AM

X TENS 0 – 2

UNITS 0 – 9

DB7, 1 = 12 HR, 0 = 24 HR

DB5, 1 = PM, 0 = AM

HOURS (01 – 12 OR 00 – 23)

DAY OF WEEK (01 – 07)

$23

$A3

X

XXX

X UNITS 1 – 7

SUNDAY = 1

$24

$A4

TENS 0 – 3

UNITS 0 – 9

DATE OF MONTH (01 – 31)

$25

$A5

$26

$A6

TENS 0 – 1

TENS 0 – 9

UNITS 0 – 9

UNITS 0 – 9

MONTH (01 – 12)

JAN = 1

YEAR (00 – 99)

$31

$B1

7

65

4

3

2

1

0

CLOCK CONTROL REGISTER

$32

$B2

7

65

4

3

2

1

0

INTERRUPT CONTROL REGISTER

WRITE–ONLY REGISTERS

N/A

$A8

TENS 0 – 5

UNITS 0 – 9

SECONDS ALARM (00 – 59)

N/A

$A9

TENS 0 – 5

UNITS 0 – 9

MINUTES ALARM (00 – 59)

N/A

PM/AM

$AA

X

X TENS 0 – 2

UNITS 0 – 9

HOURS ALARM (01 – 21 OR 00 – 23)

DB5, 1 = PM, 0 = AM IN 12 HR MODE

READ–ONLY REGISTER

$B0

N/A

7

65

4

3

2

1

0

STATUS REGISTER

RAM DATA BYTE

$00 T0 $1F $80 T0 $9F

D7

NOTE:

X = Don’t Care for Write

X = 0 for Read

N/A = Not Applicable

D6 D5 D4 D3 D2 D1 D0

Figure 6. Clock/RAM Registers

DATA

MOTOROLA

MC68HC68T1

9

Share Link: