Z8FS021 Datasheet, PDF (19/68 Pages) Zilog, Inc. – Select from an assortment of lenses and pyroelectric sensors to best fit your application

ZMOTION^® Intrusion Detection
Product Specification
11
RAM Memory Map
There is a total of 1 KB 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.
FFFh
MCU
F00h
Control Registers
EFFh
PS028806-0315
3FFh
400h
Reserved for PIR Engine
190h
User Application RAM
18Fh
(128 bytes)
110h
10Fh
100h
Standard PIR API
Advanced PIR API
0FFh
0F0h
0EFh
Reserved for PIR Engine
070h
User Application RAM
06Fh
(128 bytes)
000h
Figure 6. Z8FS040 MCU RAM Memory Map
RAM Memory Map