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SMS64FR06 데이터시트(PDF) 2 Page - Summit Microelectronics, Inc. |
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SMS64FR06 데이터시트(HTML) 2 Page - Summit Microelectronics, Inc. |
2 / 24 page SMS64 Preliminary Summit Microelectronics, Inc 2060 2.22 10/09/03 2 GENERAL DESCRIPTION The SMS64 has four major functional blocks; the supply managers and the sequencing outputs; the programmable reset and interrupt circuitry; the timing and control block; and the nonvolatile memory array. The managers are comprised of a voltage monitor with a programmable threshold input. The monitored voltage threshold can be programmed anywhere between 0.9V and 6.0V in 20mV increments. Each monitor provides an under-voltage/over-voltage (UV/OV) signal to the internal bus. Associated with each monitor is an output circuit (PUP circuit) that can be used to enable or switch an external power supply to the application’s circuits. The point in time and position in a sequence when the output is asserted is programmable and is controlled by the sequence position assignments and the PUP delays in the timing and control block. The other major block is a programmable reset and interrupt block. The SMS64 provides a great deal of flexibility in choosing the trigger source for the resets and interrupt. The sources include multiple combinations of UV/OV conditions, and programmable Watchdog and Longdog timers. Programming of the SMS64 is performed over the industry standard I 2C, 2-wire serial data interface. It allows configuration of the device, real-time control of the power-on/power-off processes and instant-access to the power supply status of the application circuit. The bus interfaces the host to 4k bits of nonvolatile memory and the programmable configuration registers. 2.5V 2.7V 1.8V --- t2 --- RST_B# RST_A# 2.0V 1.5V 3.3V Figure 1 – Example Power Supply Sequencing and System Start-up Initialization using the SMS64 as shown in the Simplified Applications Drawing on page 1. Any order of supply sequencing can be applied using the SMS64 |
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