TNETE2008

OctalPHY

EIGHT 10BASE-T PHYSICAL-LAYER INTERFACES

SPWS042B – DECEMBER 1997 – REVISED JUNE 1998

6

POST OFFICE BOX 655303

Terminal Functions (Continued)

JTAG interface

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

JTCK

53

I

Test clock. JTCK is used to clock state information and test data into and out of the device during operation of

the TAP. This terminal should be pulled up to terminal 48 if the JTAG interface is not used.

JTDI

49

I

Test data input. JTDI is used to serially shift test data and test instructions into the device during operation of the

TAP. This terminal should be pulled up to terminal 48 if the JTAG interface is not used.

JTDO

51

O

Test data output. JTDO is used to serially shift test data and test instructions out of the device during operation

of the TAP.

JTMS

52

I

Test mode select. JTMS controls the operating state of JTAG. This terminal should be pulled up to terminal 48

if the JTAG interface is not used.

JTRST

54

I

Test reset. JTRST is used for asynchronous reset of the JTAG controller. This terminal should be tied to GND

if not used.

LED interface

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

LACTIVE

67

O

LED activity indicator. LACTIVE indicates that the selected PHY is transmitting or receiving data. This signal

is low for even-numbered (0, 2, 4, 6) ports and high for odd-numbered (1, 3, 5, 7) ports.

LDUPCOL

66

O

LED duplex/collision indicator. This LED status terminal has different meaning when in full- or half-duplex

mode. In full-duplex mode, LDUPCOL is continuously driven active. In half-duplex mode, it is driven active

for 20 ms after a collision. LDUPCOL indicates full-duplex mode and collisions for the currently selected PHY.

This signal is active low for even (0, 2, 4, 6) ports and active high for odd (1, 3, 5, 7) ports.

LLINK

68

O

LED link indicator. LLINK indicates that the selected PHY has established a network link. This signal is low

for even (0, 2, 4, 6) ports and high for odd (1, 3, 5, 7) ports.

LSEL0, 1

64

O

LED select PHY 0, 1. LED select indicator for PHY0 or PHY1, depends on polarity. This signal is high for PHY0

and low for PHY1.

LSEL2, 3

63

O

LED select PHY 2,3. LED select indicator for PHY2 or PHY3, depends on polarity. This signal is high for PHY2

and low for PHY3.

LSEL4, 5

62

O

LED select PHY 4,5. LED select indicator for PHY4 or PHY5, depends on polarity. This signal is high for PHY4

and low for PHY5.

LSEL6, 7

61

O

LED select PHY 6,7. LED select indicator for PHY6 or PHY7, depends on polarity. This signal is high for PHY6

and low for PHY7.