DP8570AN National Semiconductor, DP8570AN Datasheet - Page 6
DP8570AN
Manufacturer Part Number
DP8570AN
Description
IC TIMER CLOCK PERIPHERAL 28 DIP
Manufacturer
National Semiconductor
Type
Timer Clock Peripheral (TCP)r
Datasheet
1.DP8570AVXNOPB.pdf
(26 pages)
Specifications of DP8570AN
Memory Size
44B
Time Format
HH:MM:SS:hh (12/24 hr)
Date Format
YY-MM-DD-dd
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
28-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
*DP8570AN
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DP8570AN
Manufacturer:
MICREL
Quantity:
21 373
Part Number:
DP8570AN
Manufacturer:
NS/国半
Quantity:
20 000
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
FIGURE 2 DP8570A Internal Memory Map
6
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
Register is used to select either control register block
TL F 8638 – 4