Z8FS021 datasheet(19/68 Pages) ZILOG

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PS028806-0315

RAM Memory Map

ZMOTION® Intrusion Detection

Product Specification

RAM Memory Map

There is a total of 1KB of RAM available on the base Z8F082A device. Some of this

RAM (from 070h to 0EFh and from 190h to 3FFh) is used by the ZMOTION PIR

Engine. The remainder of the RAM, from 000h to 06Fh and from 110h to 18Fh (240

bytes), is available to the application. The MCU Control Registers are located at the top of

memory, from F00h to FFFh, and are also available to the application. The area from

400h

to EFFh contains no device memory. See Figure 6.

The ZMOTION Motion Detection API is a series of registers located in the RAM memory

space in the address range 0F0h–10Fh. It is through these memory locations that configura-

tion and status are passed between the PIR Engine and the user application. Advanced API

registers are located in the range 0F0h–0FFh. See the PIR Engine and API section on

page 21 for details about these API registers and to set up the project memory environment.

Figure 6. Z8FS040 MCU RAM Memory Map

MCU

Control Registers

User Application RAM

(128 bytes)

User Application RAM

(128 bytes)

Reserved for PIR Engine

FFFh

F00h

3FFh

190h

10Fh

100h

0EFh

070h

EFFh

400h

18Fh

110h

0FFh

0F0h

06Fh

000h

Standard PIR API

Advanced PIR API

Reserved for PIR Engine

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