CDP68HC68T1(1997) View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

CDP68HC68T1
(Rev.:1997)

CMOS Serial Real-Time Clock With RAM and Power Sense/Control

Intersil 

Timing Diagrams

CDP68HC68T1

MOSI

5

W/R

A6

A

A0

5

D7O D6O D1N

DON

CE

I

SCK

C

2

4

3

FIGURE 14. WRITE-CYCLE TIMING WAVEFORMS

MOSI

MISO

CE

5

W/R

A6

A

A0

8

D7O

7

D6O DIN

I

C

SCK

4

3

System Diagrams

FIGURE 15. READ-CYCLE TIMING WAVEFORMS

11 12

DON

8

2

AC

LINE

BRIDGE

REGULATOR

VDD POR

INT

LINE

VSYS

CDP68HC68T1

VDD

VDD

IRQ

CDP68HC05C8B

VBATT CPUR

CE

SCK

MOSI

MISO

XTAL IN

RESET

PORT

SCK

MOSI

MISO

NOTE: Example of a system in which power is always on. Clock circuit driven by line input frequency.

FIGURE 16. POWER-ON ALWAYS SYSTEM DIAGRAM

17

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