ZMOT0BSB1A0AG Zilog, ZMOT0BSB1A0AG Datasheet - Page 39

• Manufacturer Part Number: ZMOT0BSB1A0AG
• Description: Processors - Application Specialized ZMB Nic RE200B-P Pyr Nic. NCL-9(26) Lens
• Manufacturer: Zilog

Specifications of ZMOT0BSB1A0AG

• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Core: Z8FS040
• Number Of Timers: 2
• Processor Series: ZMOTION
• Program Memory Size: 4 KB
• Program Memory Type: Flash
• Lead Free Status / Rohs Status: Details

PS028511-0112
Bit
Field
Control
Address
Reserved (Bits 7–5)
Buffer Refresh (Bit 4)
New Sample (Bit 3)
Uses a fast-fill algorithm to quickly refill the motion detection buffers; controlled by the application.
This bit is used to restart motion detection by quickly reinitializing and refilling the motion detection
constructed sample buffers. This method can be used to restore motion detection after waking up from
SLEEP Mode, or it can be used to help ignore external events that may cause false detections.
Waking up from SLEEP Mode:
If this bit is set when the EPIR_INIT macro is executed the Engine refills the constructed sample
buffers with a fast fill algorithm that allows it to quickly restore motion detection. Typically, a simple
external wake-up circuit would be implemented that provides an unqualified motion detection signal to
wake up the MCU from SLEEP Mode (SMR). Upon SMR, the application would set the Buffer Refresh
bit, execute EPIR_INIT, and then continue with normal motion detection functions for some period of
time before returning to SLEEP Mode. By setting this bit prior to EPIR_INIT, the Engine buffers are
filled much faster enabling it to analyze the original signal seen by the external wake-up circuit and
determine if it is actual motion.
Ignoring False Detection Events:
If the MCU is used to control external components (LED’s, relays, lights, triacs, etc.), a fluctuation on
the power supply can be created as the external device is turned on or off. The Buffer Refresh bit can
be used to ignore any false detection that could be created by these fluctuations. When the external
device is turned on or off, the application can set the Buffer Refresh bit to effectively reset the motion
detection history and therefore ignore any effect from the external device.
New sample available from PIR Signal High/Low Register.
Set by the PIR engine, cleared by the application.
• This bit indicates that the PIR engine has a new sensor signal input sample available that may be
read by the application. This status is available as an advanced feature as the application is not
normally required to read the sampled PIR sensor signal. The application must clear this bit when the
sample has been read.
Reserved Reserved Reserved
7
0
Table 18. PIR Advanced Status/Control Register 0 (ePIR_ASC0)
6
0
5
0
Refresh
Buffer
R/W
4
ZMOTION™ Detection and Control Family
F0H
Sample
New
R/W
3
MD Origin EM Noise
R
2
Product Specification
Advanced API Register Set
Detected
R/W
1
Transient
Detected
R/W
EM
0
32