4 of 19
June 22, 2001
IDT77V550
Pin Definitions
Pin Definitions
Pin Number
Symbol
Type
Description
1
SCLK
Input
40 MHz system clock.
4
RESETI
Input
Reset input. Active low.
68
RESETO
Output
Reset output. Active low.
69
RESETO
Output
Reset output. Active high.
5
RESETP0
Output
Reset output to port number 0. Active low.
6
RESETP1
Output
Reset output to port number 1. Active low.
7
RESETP2
Output
Reset output to port number 2. Active low.
8
RESETP3
Output
Reset output to port number 3. Active low.
10
RESETP4
Output
Reset output to port number 4. Active low.
11
RESETP5
Output
Reset output to port number 5. Active low.
12
RESETP6
Output
Reset output to port number 6. Active low.
13
RESETP7
Output
Reset output to port number 7. Active low.
45
SWAD0
Input
Switch VCI address. LSB.
46
SWAD1
Input
Switch VCI address.
47
SWAD2
Input
Switch VCI address.
48
SWAD3
Input
Switch VCI address.
50
SWAD4
Input
Switch VCI address.
51
SWAD5
Input
Switch VCI address.
52
SWAD6
Input
Switch VCI address.
53
SWAD7
Input
Switch VCI address. MSB.
41
MD/C
Output
Control bus. Selector for accessing data or control word.
42
MR/W
Output
Control bus. Selector for read or write operation.
43
MSTRB
Output
Control bus. Master strobe. Latching on positive edge.
31
MDATA0
I/O
Control bus. Data bus to Switch Controller. LSB.
32
MDATA1
I/O
Control bus. Data bus to Switch Controller.
33
MDATA2
I/O
Control bus. Data bus to Switch Controller.
34
MDATA3
I/O
Control bus. Data bus to Switch Controller.
36
MDATA4
I/O
Control bus. Data bus to Switch Controller.
37
MDATA5
I/O
Control bus. Data bus to Switch Controller.
38
MDATA6
I/O
Control bus. Data bus to Switch Controller.
39
MDATA7
I/O
Control bus. Data bus to Switch Controller. MSB.
15
IPD0
Input
DPI to Switch Manager interface. Data bus.
16
IPD1
Input
DPI to Switch Manager interface. Data bus.
17
IPD2
Input
DPI to Switch Manager interface. Data bus.
18
IPD3
Input
DPI to Switch Manager interface. Data bus.
19
IFRM
Input
Linecard to Switch Manager DPI interface. New frame.
Table 1 Pin Descriptions (Part 1 of 2)
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