MC9S12NE64V1 Datasheet, PDF (527/554 Pages) Freescale Semiconductor, Inc – MC9S12NE64V1 Data Sheet

EPHY Electrical Characteristics
A.14 EPHY Electrical Characteristics
NOTE
The electrical characteristics given in the EPHY section are
preliminary and should be used as a guide only. Values cannot be
guaranteed by Freescale Semiconductor and are subject to change
without notice.
Table A-18. 10BASE-T SQE (Heartbeat) Timing Parameters
Num
1
2
C
Parameter
D COL (SQE) delay after TXEN off
D COL (SQE) pulse duration
Sym
Min
Typ
Max
Units
t1
1.0
µs
t2
1.0
µs
Typical values are at 25°C.
1 BT = Bit Time = 100 ns
TXC
TXEN
COL
t1
t2
Figure A-5. 10BASE-T SQE (Heartbeat) Timing
A.14.1 10BASE-T Jab and Unjab Timing
Num
1
2
Table A-19. 10BASE-T Jab and Unjab Timing Parameters
C
Parameter
D Maximum Transmit time
D Unjab time
Sym
Min
Typ
t1
98
t2
525
Typical values are at 25°C.
1 BT = Bit Time = 100 ns
Max
Units
ms
ms
MC9S12NE64 Data Sheet, Rev. 1.1
Freescale Semiconductor
527