TWR-S08LH64 Freescale Semiconductor, TWR-S08LH64 Datasheet - Page 13

• Manufacturer Part Number: TWR-S08LH64
• Description: TOWER SYSTEM S08LH64
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of TWR-S08LH64

• Contents: Board
• Description/function: Tower System LCD Module
• Interface Type: USB
• Backlighting: No Backlighting
• Data Bus Width: 8 bit
• Module Size (w X H X T): 3.55 in x 3.2 in
• Number Of Segments: 2 x 28
• Operating Supply Voltage: 5 V
• Operating Voltage: 3.3 V
• Product: Display Modules
• Software: Software Included
• Touch Panel: No Touch Panel
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08LH
• Kit Contents: Board, Cable, CD
• Rohs Compliant: Yes
• For Use With/related Products: Freescale Tower System
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

T W R - S 0 8 L L / L H
U S E R
VDD1 Enable
The VDD1 option jumper disconnects the BUZZER, and Light sensor from board power for
low-power operation. Figure 9: below shows the option header settings for use with the
VDD1_EN
Buzzer
The TWR-S08 board provides an externally modulated piezo-buzzer for audible applications.
A push-pull drive circuit allows the target MCU to easily drive the buzzer at a center frequency
of 2400 Hz. Figure 9: below shows the option header settings for use with the buzzer.
Light Sensor
A surface-mount phototransistor, at RZ1, provides light sensitive, variable input for user
applications. Current flow within the phototransistor is inversely proportional to light intensity
incident on the surface of the device. A rail-to-rail OP amp at U5 boosts the photocell output to
useable levels. Figure 9: below shows the option header settings for use with the light sensor
Figure 9: USER1 Option Header, JP7
Pushbutton Switches
The TWR-S08 applies 4, normally open, push-button switches for user input. Each push-
button switch is configured for active-low operation. A 22pF capacitor is applied to each push-
button switch to minimize switch bounce. An external pull-up is applied to SW4 for use as and
IRQ* input; however, no bias is applied to the remaining push-button inputs. Use of target
MCU internal pull-ups is required for proper operation.
Figure 10 below shows the user switch connections to the target MCU. Since each push-
button switch is normally-open, no option header is applied.
(*) – Default Position
G U I D E



JP7
SW1 and RZ1 share a common MCU signal input. If both components are
 Buzzer
 RZ1
 VDD1
enabled at the same time, SW 1 may not function properly.
U S E R
G U I D E
Signal
PTC2/TPM1CH0
PTA6/ADP6
VDD
CAUTION:
13
Enabled (*)
Enabled (*)
Enabled (*)
ON
Disabled
Disabled
Disabled
OFF
A P R I L
2 7 ,
2 0 1 0