cdp68hc68t1 Intersil Corporation, cdp68hc68t1 Datasheet - Page 17

• Manufacturer Part Number: cdp68hc68t1
• Description: Cmos Serial Real-time Clock With Ram And Power Sense/control
• Manufacturer: Intersil Corporation

Timing Diagrams
System Diagrams
NOTE: Example of a system in which power is always on. Clock circuit driven by line input frequency.
MOSI
SCK
CE
MOSI
MISO
LINE
SCK
CE
AC
I
I
17
4
5
W/R
REGULATOR
5
W/R
BRIDGE
4
FIGURE 16. POWER-ON ALWAYS SYSTEM DIAGRAM
A6
FIGURE 14. WRITE-CYCLE TIMING WAVEFORMS
FIGURE 15. READ-CYCLE TIMING WAVEFORMS
A6
3
3
LINE
CDP68HC68T1
V
XTAL IN
BATT
A0
CDP68HC68T1
V
A0
DD
A
CPUR
MOSI
MISO
V
POR
SCK
A
SYS
INT
CE
C
C
V
DD
D7
D7
8
O
7
5
O
CDP68HC05C8B
IRQ
RESET
PORT
SCK
MOSI
MISO
D6
D6
O
O
V
DD
D1
N
DI
N
DO
2
DO
N
11
2
N
12
8
October 29, 2007
FN1547.8