DS1670集成电路（IC）的实时时钟规格书PDF中文资料

DESCRIPTION

The Portable System Controller is a circuit, which incorporates many of the functions necessary for low power portable products integrated into one chip. The DS1670 provides a Real Time Clock, NV RAM controller, microprocessor monitor, and a 3-channel, 8-bit analog-to-digital converter. Communication with the DS1670 is established through a simple 3-wire interface.

FEATURES

■ Provides real time clock:

− Counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap year compensation valid up to 2100

− Power control circuitry supports system power-on from day/time alarm

■ Microprocessor monitor:

− Halts microprocessor during power fail

− Automatically restarts microprocessor after power failure

− Monitors pushbutton for external override

− Halts and resets an out of control microprocessor

■ NV RAM control:

− Automatic battery backup and write protection to external SRAM

■ 3-channel, 8-bit analog-to-digital converter

■ Simple 3-wire interface

■ 3.3V operation