Cypress CY14B256K - Manual (Page 10)

CY14B256K
Document Number: 001-06431 Rev. *H Page 10 of 28
Figure 5. Interrupt Block Diagram
Figure 6. RTC Recommended Component Configuration
WDF - Watchdog Timer Flag
WIE - Watchdog Interrupt
PF - Power Fail Flag
PFE - Power Fail Enable
AF - Alarm Flag
AIE - Alarm Interrupt Enable
P/L - Pulse Level
H/L - High/Low
Enable
Watchdog
Timer
Power
Monitor
Clock
Alarm
VINT
WDF
WIE
PF
PFE
AF
AIE
P/L
Pin
Driver
H/L
INT
V
CC
V
SS
C
1
C
2
RF Y
1
X
1
X
2
A
0
A
1
A
2
A
3
DQ
0
Recommended Values:
Y1 = 32.768KHz
RF = 10M Ohm
C1 = 0 (install cap footprint, but leave unloaded)
C2 = 56 pF + 10% (do not vary from this value)
Note
4. Schottky diodes, (V
F
< 0.4V with I
F
at 100mA) are recommended at pins A
0
- A
3
and DQ
0
in applications where undershoot exceeds -0.5V. Please see application note
AN49947 for further details.
[+] Feedback