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參數(shù)資料
| 型號(hào)： | DEMO9S08RG60UM |
| 英文描述： | DEMO9S08RG60 Demonstration Board Users Manual |
| 中文描述： | DEMO9S08RG60演示板用戶(hù)手冊(cè) |
| 文件頁(yè)數(shù)： | 13/19頁(yè) |
| 文件大?。?/td> | 167K |
| 代理商： | DEMO9S08RG60UM |
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D E M O 9 0 8 R G 6 0
A U G U S T 6 , 2 0 0 4
13
Table 2: COM Connections
HC08 Port
MCU Pin
COM Signal
I/O PORT
Connector
J1-5
J1-7
PTE0/TXD
PTE1/RXD
U1-2
U1-3
TXD OUT
RXD IN
COM Connec tor
A standard 9-pin Dsub connector provides external connections for the SCI port. The SCI port
provides an alternate interface for use with the MON08 monitor. Component U2 provides RS-
232 translation services. The figure below details the DB9 connector.
Figure 3: COM Connector
1
6
TXD
2
7
RTS
RXD
3
8
CTS
4
9
NC
GND
5
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 NULL status to the host.
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 4: COM_MODE Jumper
COM
RS-232 Communications on COM
Enabled
MON
MON08 on Port PTA0 Communica-
tions on COM Enabled
COM S elec t J umper
The COM_SEL jumper selects between the RS-232 protocol or the LIN protocol on the MCU
SCI port.
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