ASIX ELECTRONICS CORPORATION

9

CONFIDENTIAL

AX88615P 5-Port 10/100Mb Switch Controller

PRELIMINARY

2.2 LED Display

Signal Name

Type Pin No.

Description

LED[1:0]

O

85, 84

SSRAM Fail / Buffer Memory Utilization LED :

v As utilization of buffer memory

The buffer utilization of switch uses the following definition:

1: Led off

0: Led on

For detail , see the LED timing specification.

v SSRAM Fail

LED[0] : This signal also indicates SRAM chip 0 fail ( continue active low )

during the interval of sequence shift data.

LED[1] : This signal also indicates SRAM chip 1 fail ( continue active low )

during the interval of sequence shift data.

LED_CK

O

86

LED Clock : The signal is a discontinue clock for LED signals serial shift

out. The clock period width is 400nS and last 32 cycle with every 52.4ms

repeated.

2.3 Buffer memory pins group

Signal Name

Type Pin No.

Description

BMA[16:0]

O

197–201

16,17

170,166

143,142

23-18

SSRAM Address Bus

BMD[31:24]

BMD[23:16]

BMD[15:8]

BMD[7:0]

I/O

24, 26-32

133-138

140, 141

171-173

175-179

180,

188-194

SSRAM Data Bus

/BMWE

O

158

SSRAM Write Strobe

/BMOE

O

159

SSRAM Read Strobe

BMCLK

O

72

SSRAM CLOCK

Utilization (%)

UTI0

UTI1

UTI2

UTI3

UTI4

UTI5

0

1

1

1

1

1

1

10

0

1

1

1

1

1

20

0

0

1

1

1

1

40

0

0

0

1

1

1

60

0

0

0

0

1

1

80

0

0

0

0

0

1

95

0

0

0

0

0

0