ZMOT0BSB0A0BG Zilog, ZMOT0BSB0A0BG Datasheet - Page 39

• Manufacturer Part Number: ZMOT0BSB0A0BG
• Description: Microcontrollers (MCU) ZMB N. SDA02-54-P Py Fr AA 0.9 GI T1 Lens
• Manufacturer: Zilog

Specifications of ZMOT0BSB0A0BG

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

PS028510-0111
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 can be used as a method 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 re-fills 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 ‘real’ motion.
Ignoring False Detection Events:
If the MCU is used to control external components (LED’s, relays, Lights, Triac’s, 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