79RC32K438-266BB IDT, 79RC32K438-266BB Datasheet - Page 27

• Manufacturer Part Number: 79RC32K438-266BB
• Description: Processors - Application Specialized
• Manufacturer: IDT

Specifications of 79RC32K438-266BB

• Part # Aliases: IDT79RC32K438-266BB

Ethernet
MIIMDC
MIIMDIO
MIIxRXCLK,
MIIxTXCLK
MIIxRXCLK,
MIIxTXCLK
MIIxRXD[3:0],
MIIxRXDV,
MIIxRXER
MIIxTXD[3:0],
MIIxTXENP,
MIIxTXER
IDT 79RC32438
1.
2.
There are two MII interfaces and the timing is the same for each. “X” represents interface 0 or 1.
The values for this symbol were determined by calculation, not by testing.
Signal
1
3
3
Symbol
Thigh_9a,
Thigh_9c,
Thigh_9d,
DMAREQN
Trise_9c,
Trise_9d,
Tlow_9a
Tdo_9b
Tlow_9d
Tper_9a
Thld_9b
Tper_9c
Tlow_9c
Tper_9d
Thld_9e
Tfall_9c
Tfall_9d
Tsu_9b
Tsu_9e
Tdo_9f
EXTCLK
ICLK
CSN
2
None
MIIMDC rising
None
None
MIIxRXCLK
MIIxTXCLK
rising
Reference
rising
Tpw_8n is the minimum amount of time before DMAREQN is
Edge
recognized as asserted or deasserted.
399.96 400.4 399.96 400.4 399.96 400.4 399.96 400.4
40.0
16.0
10.0
39.9
14.0
10.0
10.0
200MHz
Min
140
0.0
0.0
10
—
—
Tpw_8n
Table 9 Ethernet AC Timing Characteristics
Figure 11 DMAREQN AC Timing Waveform
Max
40.0
26.0
25.0
300
260
3.0
2.0
—
—
—
—
—
—
33.3
13.0
10.0
39.9
14.0
10.0
10.0
233MHz
Min
140
0.0
0.0
10
—
—
27 of 59
Max
40.0
26.0
25.0
300
260
3.0
2.0
—
—
—
—
—
—
Tpw_8n
30.0
12.0
10.0
39.9
14.0
10.0
10.0
266MHz
Min
140
0.0
0.0
10
—
—
Max
40.0
26.0
25.0
300
260
3.0
2.0
—
—
—
—
—
—
30.0
12.0
10.0
39.9
14.0
10.0
10.0
Min
300MHz
140
0.0
0.0
10
—
—
Max
40.0
26.0
25.0
300
260
3.0
2.0
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
10 Mbps
100 Mbps
Conditions
May 25, 2004
See Figure 12.
Reference
Diagram
Timing