88e3015 Marvell Semiconductor, Inc., 88e3015 Datasheet - Page 54

• Manufacturer Part Number: 88e3015
• Description: Integrated 10/100 Fast Ethernet Transceiver
• Manufacturer: Marvell Semiconductor, Inc.

Sample allows a snapshot to be taken of the data flowing from the system pins to the on-chip test logic or vice
versa, without interfering with normal operation. The snapshot is taken on the rising edge of TCK in the Capture-
DR controller state, and the data can be viewed by shifting through the component's TDO output.
While sampling and shifting data out through TDO for observation, preload allows an initial data pattern to be
shifted in through TDI and to be placed at the latched parallel output of the boundary-scan register cells that are
connected to system output pins. This ensures that known data is driven through the system output pins upon
entering the extest instruction. Without preload, indeterminate data would be driven until the first scan sequence is
complete. The shifting of data for the sample and preload phases can occur simultaneously. While data capture is
being shifted out, the preload data can be shifted in.
One scan chain is available for the 88E3018 devices.
Table 28:
Doc. No. MV-S103657-00, Rev. C
Page 54
PI N
MDIO
MDIO
MDIO
MDC
(RGMII)
RX_CTRL
RXD[0]
RXD[1]
RX_CLK
RXD[2]
RXD[3]
TXD[0]
TXD[1]
TX_CLK
TXD[2]
TXD[3]
TX_CTRL
CONFIG[0]
CONFIG[1]
CONFIG[2]
CONFIG[3]
LED[0]
LED[0]
LED[1]
LED[1]
LED[2]
LED[2]
COMAn
RESET
SIGDET
88E3018 Boundary Scan Chain Order
I/ O
Output Enable
Output
Input
Input
Output Enable
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Output Enable
Output
Output Enable
Output
Output Enable
Output
Input
Input
Input
88E3015/88E3018
Integrated 10/100 Fast Ethernet Transceiver
Document Classification: Proprietary Information
CONFIDENTIAL
October 26, 2006, Advance
Copyright © 2006 Marvell