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MTD655 Revision 2.0 17/03/2000

MTD655

MYSON

TECHNOLOGY

ICLK10

83

I/O 10M Inter-Bus port clock.

IDAT10

81

I/O 10M Inter-Bus port data bit

100M Inter-Bus Interface pins

Name

Pin Number

I/O

Descriptions

IACKB100

75

I/O 100M Inter-Bus port access acknowledge signal (low active). For master

hub, this pin is output; for slave hub is input, or while EXT_ARB

jumper was set to “1”, this pin is input from an external arbitration

device.

ICOLB100

76

I/O 100M Inter-Bus collision signal (low active). For master hub, this pin

can output multi hub collision event to inform all slave hub ; for slave

hub, this pin is an input, or while EXT_ARB jumper was set to “1”, this

pin is input from an external arbitration device.

IREQ100_IN0

79

I

100M Inter-Bus port access request input.

IREQ100_IN1

78

I

100M Inter-Bus port access request input.

IREQ100_IN2

77

I

100M Inter-Bus port access request input.

IREQ100_OUT

80

O

100M Inter-Bus port access request output.

ICLK100

73

I/O 100M Inter-Bus port clock.

IDAT100_0

71

I/O 100M Inter-Bus port data bit 0.

IDAT100_1

70

I/O 100M Inter-Bus port data bit 1.

IDAT100_2

69

I/O 100M Inter-Bus port data bit 2.

IDAT100_3

68

I/O 100M Inter-Bus port data bit 3.

LED Interface Pins

Name

Pin Number

I/O

Descriptions

LEDDAT

124

I/O

LED display serial data out; mapping for LEDCLK signal’s burst clock

, its serial out data sequence is : ( first bit be shifted out is from b00, and

end of burst bit is b23)

b00: ***********

b08: 10hub_col

b16: ************

b01: **********

b09: 100hub_col

b17: ************

b02: **********

b10: asram_test_fail

b18: ************

b03: port0 partition

b11: port0 partition

b19: port0 rx_activity

b04: port1 partition

b12: port1 partition

b20: port1 rx_activity

b05: port2 partition

b13: port2 partition

b21: port2 rx_activity

b06: port3 partition

b14: port3 partition

b22: port3 rx_activity

b07: port4 partition

b15: port4 partition

b23: port4 rx_activity

LEDCLK

125

I/O

LED display clock signal, the signal is a discontinued clock for LED

data serial shift out. Every clock burst have 24 cycles ( period : 160 ns),

and the clock burst will be repeated with every 42ms.

10M Inter-Bus Interface pins

Name

Pin Number

I/O

Descriptions