DEMO908AP64 Freescale Semiconductor, DEMO908AP64 Datasheet - Page 11

• 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
COM Connector
A standard 9-pin Dsub connector provides external connections for the SCI port. The SCI port
provide an alternate interface for use with the MON08 monitor. Component U3 provides RS-
232 translation services. The figure below details the DB9 connector.
Figure 4: COM Connector
The communications mode of the COM port is determined by the COM_SEL jumper. This 3-
pin jumper allows the user to select between SCI serial communications and single-wire
MON08 communications.
Figure 5: COM_SEL Jumper Settings
Single-Wire MON08 Communications
The module provides MON08 access through the COM connector. MON08 on the COM port
is enabled by the COM_SEL, the MON_EN, OSC_SEL, and VTST_EN option jumpers. This
allows MON08 debugging without the expense of a 3
shows the selection settings for the COM_SEL jumper. See the MON08 Debug Mode section
for more details.
Figure 6: MON_EN Jumper Setting
TXD
RXD
GND
1
1 2 OFF
1
2
3
4
5
ON
6
7
8
9
3
RTS
CTS
NC
Selects MON08 Port PTA0 Communications on COM
Selects SCI Port Communications on COM
MON08 Monitor Mode Enabled
MON08 Monitor Mode Disabled
Female DB9 connector that interfaces to the HC08 internal SCI1 serial
port via the U2 RS232 transceiver. It provides simple 2 wire asynchro-
nous serial communications without flow control. Flow control is provided
at test points on the module.
Pins 1, 4, and 6 are connected together for status NULL to the host.
11
rd
-party MON08 pod. The table above
J U N E
2 8 ,
2 0 0 4