资料介绍
CS8900-210BASE-T WIRING
transformer
TXD+ TXDRt
50Ω 1%
68pF 0.01uF
1:1.414
TD+ TD-
RJ-45
1 2 RD+ 3 4 5 RD6 7 8
Rt
YL18-1064S
CS8900A
RXD+
Rr Rr 0.01uF
1:1
RXD-
For 3.3V operation the turns ratio on TX+ and TXD- is 1:2.5(transfomer:YL18-1080S),Rt is 8ohm for 100ohm cable and the 68pF cap changes to 560pF.
AUI WIRING
CS8900A DO+ TX DOYL18-1005D 1:1
transformer
1:1 3
DB15
10 4 2 9 1:1
CoI
CI+ CI-
39.2 ohm
0.01uF
39.2 ohm
RX
DI+
39.2 ohm
0.01uF
5 12 13 6 +12V
DI- 39.2
ohm
注:网络变压器 YL18-1080S,YL18-1064S,YL18-1005D 是裕泰电子公司的. 联系方式:0086-574-63620701 EMAIL:nico_yu@yeah.net
+5V EE_CLK EE _DIN o.1uF 1 2 3 5 ELCS 8 4 7 6
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
0.1uF
+5V
CS CLK D1 VSS
VCC D0 NC1 NC2
1K_EEPROM_ S 57 10 70 23 22 94 95 55 56 69 86 85 89 90 4.99K X1 1 XTAL 20.0MHz 2