RS232 Introduction
11
RS-232 Introduction H.C. Tsou 10/31/2003
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Transcript of RS232 Introduction
RS-232 Introduction
H.C. Tsou
10/31/2003
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
Serial Communication
• Synchronous– I2C
• SCL (Clock), SDA(Data)
• Asynchronous– RS-232
• TXD(Transmit Data), RXD(Receive Data)
Hardware
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
W/PS2 Cable (I)
• 50.J0510.5D1(Except PB7 Series)
J72210252001
G1G1
G2G2
11
22
33
44
55
66
77
88
J82022006009
2
3
4
5
6
7
8
9
1
G1G2
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
W/PS2 Cable (II)
• 50.J5019.501 (PB7 Series)
J72210252001
G1G1
G2G2
11
22
33
44
55
66
77
88
J82022006009
2
3
4
5
6
7
8
9
1
G1G2
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
W/ D-Sub Cable• Download Board (PB2 & PB6100)
L102022014015
1728394105
11
12
13
14
15
6G1
G2
L102022014015
1728394105
11
12
13
14
15
6
G1
G2
Download Board
PORTRIGHT-L
USE W/PS2 Cable To PC
PORTRIGHT-L
USE W/D-SUB 9 Pin Cable To PC
PORTRIGHT-L
PORTRIGHT-L
VGA Input From PC
VGA OUT +RS232 OUT TO Projector
J72210252001
G1G1
G2G2
11
22
33
44
55
66
77
88
J82022006009
2
3
4
5
6
7
8
9
1
G1
G2
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
Accessory
• W/ PS2 connector– PS2 Male to D-SUB 9 Pin Male Cable
• W/ D-SUB Connector– PS2 Male to D-SUB 9 Pin Male Cable x1
– D-SUB Male to D-SUB Male Cable x2
– Download Board (12V to 3.3V)
Protocol
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
RS232 Format
• Data Format– Communicate Rate: 115200,19200…bps
– Bit Length:8
– Parity bit :none
– Stop Bit :1
BENQ Confidential (yyyy/mm/dd) 2003, BENQ Corporation
Function About RS232
• Download Firmware– Baud Rate:115200bps
– Pixelworks Download Program
• Software OSD Control– Baud Rate:19200bps
– VB Interface Program
