DEMO908AP64 Freescale Semiconductor, DEMO908AP64 Datasheet - Page 12

• Manufacturer Part Number: DEMO908AP64
• Description: BOARD DEMO FOR 908AP64
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of DEMO908AP64

• Contents: Board, CDs, Cable, Filter
• Processor To Be Evaluated: MC68HC908AP
• Data Bus Width: 16 bit
• Interface Type: RS-232
• Silicon Manufacturer: Freescale
• Core Architecture: HC08
• Core Sub-architecture: HC08
• Silicon Core Number: MC68HC908
• Silicon Family Name: HC08AP
• Kit Contents: Demo Board, Cables, Software, Guides
• Rohs Compliant: No
• For Use With/related Products: MC68HC908AP Family
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

D E M O 9 0 8 A P 6 4
VTST_EN
The VTST _EN jumper enables the voltage level necessary to place the MCU in MON08
monitor mode. An 8.2V zener diode at D1 sets the appropriate voltage level on the MCU IRQ*
signal line. When using the MON08 monitor mode, the input voltage on TB1 must be 9VDC
minimum.
Figure 7: VTST_EN Jumper Setting
The following table details the settings necessary to configure the MCU for MON08 monitor
mode operation via the COM port.
Figure 8: Single-Wire MON08 Setup
USER Components
The DEMO908AP64 provides 2 user push switches, 2 LED indicators, a potentiometer, and
photocell circuit for user application. To isolate assigned I/O ports from these features, the
USER EN option is provided.
Table 3: User EN Option Settings
MON_EN
VTST_EN
COM_SEL
OSC_SEL
NOTE: To utilize the single-wire MON08 monitor mode, the input voltage must
Jumper
User 1
User 2
User 3
User 4
User 5
User 6
1 2 OFF
exceed 9.0VDC.
ON
3
3
IRQ* signal line set to 8.2V. MON08 monitor mode force entry
enabled.
IRQ* signal line pulled up to V
if Reset vector is erased.
ON
ON
On
Enable SW1
Enable SW2
Enable LED1
Enable LED2
Enable RV1
Enable RZ1
Single-Wire MON08 Enabled
MCU in Monitor Mode
MON08 Signaling Enabled
9.8304 MHz Oscillator selected
12
Off
Disable SW1
Disable SW2
Disable LED1
Disable LED2
Disable RV1
Disable RZ1
DD
. MON08 monitor mode available
MCU PORT
PTD0 (U1-3)
PTD1 (U1-2)
PTB4 (U1-13)
PTB5 (U1-8)
PTA4 (U1-29)
PTA5 (U1-28)
J U N E
2 8 ,
2 0 0 4