DP8570A datasheet(6/26 Pages) NSC

tên linh kiện	DP8570A

Giải thích chi tiết về linh kiện	Timer Clock Peripheral (TCP)

PDF	26 Pages

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nhà sản xuất	NSC [National Semiconductor (TI)]

Trang chủ	http://www.national.com

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6 / 26 page

Functional Description

The DP8570A contains a fast access real time clock two 10

MHz 16-bit timers interrupt control logic power fail detect

logic and CMOS RAM All functions of the TCP are con-

trolled by a set of nine registers A simplified block diagram

that shows the major functional blocks is given in

Figure 1

The blocks are described in the following sections

1 Real Time Clock

2 Oscillator Prescaler

3 Interrupt Logic

4 Power Failure Logic

5 Additional Supply Management

6 Timers

The memory map of the TCP is shown in the memory ad-

dressing table The memory map consists of two 31 byte

pages with a main status register that is common to both

pages A control bit in the Main Status Register is used to

select either page

Figure 2 shows the basic concept

Page 0 contains all the clock timer functions while page 1

has scratch pad RAM The control registers are split into

two separate blocks to allow page 1 to be used entirely as

scratch pad RAM Again a control bit in the Main Status

TLF8638 – 4

FIGURE 2 DP8570A Internal Memory Map

DP8570A bảng dữ liệu(PDF) 6 Page - National Semiconductor (TI)