Description
Interrupt Output A (open drain) INTB (INTB)
Interrupt Output B (open drain) A0
A16
Address Inputs DQ0
DQ7
Data Input/Output CE
Chip Enable OE
Output Enable WE
Write Enable VCC
+5 Volts GND
Ground SQW
Square Wave Output NC
No Connection X1, X2
Crystal Connection VBAT
Battery Connection
INTB
INTB (INTB) A15 A16 PFO VCC WE OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 D
Features
- 128 kbytes of user NV RAM Integrated NV SRAM, real-time clock, crystal, power-fail control circuit and lithium energy source.
- Totally nonvolatile with over 10 years of operation in the absence of power.
- Watchdog timer restarts an out-of-control processor.
- Alarm function schedules real-time related www. DataSheet4U. com activities such as system wakeup.
- Programmable interrupts and square wave output.
- All registers are individually addressable via the address and data bus.