am79c970 Advanced Micro Devices, am79c970 Datasheet - Page 146

• Manufacturer Part Number: am79c970
• Description: Pcnettm-pci Single-chip Ethernet Controller For Pci Local Bus
• Manufacturer: Advanced Micro Devices

SWITCHING WAVEFORMS: Attachment Unit Interface
Note:
1. Internal signal and is shown for clarification only.
Note:
1. Internal signal and is shown for clarification only.
ISTDCLK
ISTDCLK
ITXDAT+
ITXDAT+
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
XTAL1
XTAL1
ITXEN
ITXEN
DO+
DO+
DO–
DO
DO–
DO
1
1
t
XI
Bit (n–2)
1
Transmit Timing – End of Frame (Last Bit = 0)
1
0
Transmit Timing – Start of Frame
1
0
P R E L I M I N A R Y
Bit (n–1)
0
Am79C970
0
1
t
DOTR
Bit (n)
0
1
Typical > 200 ns
t
DOETD
t
X1H
t
DOTF
t
X1L
0
t
X1F
18220C-47
18220C-48
AMD
t
1
X1R
1-1013