Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X Datenbogen
Produktcode
DK-TM4C129X
32.19.3
AC Characteristics
Table 32-53. Ethernet Controller Enable and Software Reset Timing
Unit
Max
Nom
Min
Parameter Name
Parameter
Parameter No.
µs
-
-
45
Time from the System Control enable of the
PHY to energy on the PMD output pin
PHY to energy on the PMD output pin
ab
T
EN
N16
ns
-
-
110
Time from software reset of the PHY to energy
on the PMD output pin
on the PMD output pin
T
SWRST
N17
a. The PHY is enabled through System Control by setting the P0 bit in the PCEPHY register and the R0 bit in the RCGCPHY
register.
b. This minimum timing assumes the
PHYHOLD
bit in the EMACPC register is not set.
Figure 32-37. Reset Timing
CLK
N16
PMD Output Pair
PHY Enable
PHY SW Reset
N17
Table 32-54. MII Serial Management Timing
Unit
Max
Nom
Min
Parameter Name
Parameter
Parameter No.
MHz
2.5
-
-
EN0MDC
frequency
F
MDC
N20
ns
150
-
0
EN0MDC
to
EN0MDIO
(output) delay
time
T
MDIO_DLY
N21
ns
-
-
10
EN0MDIO
(input) to
EN0MDC
setup time
T
MDIO_SU
N22
ns
-
-
10
EN0MDIO
(input) to
EN0MDC
hold time
T
MDIO_HLD
N23
December 13, 2013
2148
Texas Instruments-Advance Information
Electrical Characteristics