Z8FS040BSB20EG Zilog, Z8FS040BSB20EG Datasheet - Page 21

• Manufacturer Part Number: Z8FS040BSB20EG
• Description: IC MCU 4KB FLASH IRDA 8SOIC
• Manufacturer: Zilog
• Series: ZMOTION™r

Specifications of Z8FS040BSB20EG

• Applications: Infrared Motion Detection
• Core Processor: eZ8
• Program Memory Type: FLASH (4 kB)
• Controller Series: Z8 Encore! XP®
• Interface: IrDA, UART/USART
• Number Of I /o: 5
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Ram Size: -
• Other names: 269-2512

Hardware Connection Requirements
This section describes the required external hardware connection for the ZMOTION
Pins are automatically configured to their required function when the PIR engine is initialized via the
EPIR_INIT macro.
See
The device can be operated in Single Pyro mode supporting one Pyroelectric sensor or Dual Pyro
mode supporting two Pyroelectric sensors. Both of these modes can be operated in Normal or Low
Scan Rate modes.
Depending on the application, there can be up to 3 connection requirements supporting these modes:
1. Pyroelectric Sensor (PIR Sensor)
2. ADC
3. Pyroelectric Passive Infrared Sensor #2
PS028506-1110
Appendix A
The signal from the PIR sensor is connected directly to the ANA2 input of the ADC. The ADC
is configured for differential, buffered mode by Zilog’s PIR technology. The sensor signal
should be connected directly to the ADC input with no additional signal conditioning circuitry
unless specified by the pyroelectric sensor manufacturer.
The on chip
differential input of the ADC (ANA2) and the
(ANA3). The 8 pin device has an internal connection from
configuration therefore no external hardware connection is required. The 20 and 28 pin
devices require an external connection from the
In Dual Pyro mode, the ADC is still used in differential, buffered mode (same as Single Pyro
mode). The signal from the second PIR sensor is connected to ANA3. The
longer connected to ANA3 (‘-‘ ADC input). The fist PIR sensor is connected to the ‘+’ ADC
input (ANA2) as it is in Single Pyro mode. The
but the external pin is unused in Dual Pyro mode.
V
REF
for example schematic diagrams showing the required connections.
V
REF
is configured for 1V nominal. The PIR Sensor signal is connected to the ‘+’
PRELIMINARY
V
REF
V
REF
V
signal is connected to the ‘-‘ differential input
REF
signal is still used internally for the ADC,
out signal to the ADC ‘-‘ (ANA3) input.
ZMOTION
V
REF
to ANA3 to support this
TM
Detection and Control Family
Product Specification
V
TM
REF
MCU Series.
signal is no
16