文档介绍：1 2 3 4 5 6
D D
VDD_3V
R1101
2K
A1 B1 C1 D1
SPIMISO1
SW-PB SW-PB SW-PB SW-PB
SPIMISI1 R1102
SPICLK1 2K
C A2 B2 C2 D2 C
nSS1
SW-PB SW-PB SW-PB SW-PB
SPIMISO0
R1103
SPIMISI0
2K
A3 B3 C3 D3
SPICLK0
SW-PB SW-PB SW-PB SW-PB
nSS0
R1104
2K
A4 B4 C4 D4
SW-PB SW-PB SW-PB SW-PB
B B
A A
Title
KEY BOARD
Size Number Revision
B 11
Date: 3-Jun-2004 Sheet11 of 12
File: C:\Documents and Settings\jzm\桌面\EX24Drawn10底板 By:_ALL\
1 2 3 4 5 6
1 2 3 4 5 6
D D
C1008 C1007 C1006 C1005
U1001
U1000 6 4
C2 - C1 -
6 C2 - C1 - 4 SGND 5 C2+ C1+ 2
SGND 5 2
C2+ C1+
C1002 18 14 VCC
GND FORCEON
C1009 18 14 VCC C1001 7 20
C1010 7 GND FORCEON 20 3 V- #FORCEOFF 11
V- #FORCEOFF V+ #INVALID
3 11 19 1
V+ #INVALID VCC VCC EN SGND
19 1 SW1000
VCC VCC EN SGND
SGND 9 10 5 4 RXD1
R2IN R2OUT
nCTS0 9 R2IN R2OUT 10 CTS0 nRXD12 16 R1IN R1OUT 15 6 3 RXD2
nRXD0 16 15 RXD0 7 2 TXD1
R1IN R1OUT
C1011 RTS0 8 12 8 1 TXD2
T2OUT T2IN
nRTS0 8 12 TXD0 nTXD12 17 13
T2OUT T2IN T1OUT T1IN
nTXD0 17 T1OUT T1IN 13 VCC SW-SPST4
VCC MAX3223
UART
C MAX3223 C
C1000

SGND
1001
1 1
6 6
nTXD0 2 nTXD12 2
nRTS0 7 7
nRXD0 3 nRXD12 3
B nCTS0 8 8 B
4 4
9 9
5 5
DB9 DB9
A A
Title
UART
Size Number Revision
B 10
Date: 3-Jun-2004 Sheet of
File: C:\Documents and Settings\jzm\桌面\EX24Drawn10底板 By:_ALL\
1 2 3 4 5 6
1 2 3 4 5 6
D D
VCC
7 18 31 42
U501
nFCE 48 DRIVER FOR PROTECTING DATA BUS
1G
nFRE 501
1DIR
VCC VCC VCC VCC 24
Switch2
VCC 25 2G VCC 23 Switch1
24
2DIR
C 12 C
VCC
LDATA00 47 2 B_D00 11
1A1 1B1 GND
LDATA01 46 3 B_D01 B_D04 13
LDATA02 44 1A2 1B2 5 B_D02 10 MD4
1A3 1B3 GND
LDATA03 43 6 B_D03 B_D05 14
1A4 1B4 MD5
LDATA04 41 8 B_D04 B_D03 9
1A5 1B5 MD3
LDATA05 40 9 B_D05 B_D06 15
1A6 1B6 MD6
LDATA06 38 1A7 1B7 11 B_D0