DEMO908AP64E Freescale Semiconductor, DEMO908AP64E Datasheet - Page 13

• Manufacturer Part Number: DEMO908AP64E
• Description: BOARD DEMO FOR 908AP64
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO908AP64E

• Contents: Board, CDs, Cable, Filter
• Silicon Manufacturer: Freescale
• Core Architecture: HC08
• Core Sub-architecture: HC08
• Silicon Core Number: MC68HC908
• Silicon Family Name: HC08AP
• Kit Contents: Board Cables CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: 908AP64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

D E M O 9 0 8 A P 6 4
J U N E
2 8 ,
2 0 0 4
SW1 and SW2 Pushbutton Switches
Two push button switches provide momentary active low input for user applications. Switches
SW1 and SW2 are enabled to the HC08 I/O ports by the USER option bank. SW1 and SW2
provide input to HC08 I/O ports PTD0/KBI0 and PTD1/KBI1 respectively.
LED1 and LED2 Indicators
Indicators LED1 and LED2 are enabled from HC08 I/O ports by the USER EN option. The
LED indicators are active low and will illuminate when a logic low (0 value) signal is driven from
the respective MCU I/O port. MCU ports PTB4/T1CH0 and PTB5/T1CH1 drive LED1 and
LED2 respectively.
RV1 Potentiometer
A 5k Ω, thumb-wheel potentiometer at RV1 provides variable resistance output for user
applications. The device provides a 0 to VDD (+5V typically) output to the PTA4/ADC4 input
when enabled.
RZ1 Photocell
RZ1 is visible light sensitive photocell with an amplifying OPAMP circuit that provides a
variable voltage output for user applications. Circuit output voltage of .5V to VDD typically and
is inversely proportional to light intensity on the surface of the RZ1 device (VDD = Dark). When
enabled the circuit output voltage is provided to MCU port PTA5/ADC5 input for user
application.
Infrared Transceiver
A
IRDA serial infrared transceiver at U4 supports infrared serial communications of 2.4K – 115.2 Kbps
to a typical distance of 1 meter. The transceiver (ZHX1010) combines an infrared emitting diode
(IRED), a PIN photodiode detector, a digital AC coupled IRLED driver, and a receiver/decoder with
noise discrimination circuitry in a single, miniature package.
The IRDA transceiver connects to the MCU I/O signals PTC7/SCRXD and PTC6/SCTXD. Both signals
are also available at connector J1. The IRDA transceiver may be removed from the MCU I/O connec-
tions by opening cut-traces CT2 and CT3. The cut-traces maybe restored by installing a 0805 SMT 0-
ohm resistor or wire modification with a solder iron.
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