3
2
Start
Bit
Data Bits
UART_TXD
5
Data Bits
Bit
Start
4
UART_RXD
1
MII_TXCLK (input)
MII_TXD[3:0],
MII_TXEN (outputs)
AM3359, AM3358, AM3357, AM3356, AM3354, AM3352
SPRS717H – OCTOBER 2011 – REVISED MAY 2015
Table 7-110. PRU-ICSS MII_RT Switching Characteristics - MII_TXD[3:0] and MII_TXEN
(see
)
10 Mbps
100 Mbps
NO
UNIT
.
MIN
TYP
MAX
MIN
TYP
MAX
t
d(TX_CLK-TXD)
Delay time, TX_CLK high to TXD[3:0] valid
1
5
25
5
25
ns
t
d(TX_CLK-TX_EN)
Delay time, TX_CLK to TX_EN valid
Figure 7-112. PRU-ICSS MII_TXD[3:0], MII_TXEN Timing
7.14.4 PRU-ICSS Universal Asynchronous Receiver Transmitter (PRU-ICSS UART)
Table 7-111. Timing Requirements for PRU-ICSS UART Receive
(see
)
NO.
MIN
MAX
UNIT
3
t
w(RX)
Pulse duration, receive start, stop, data bit
0.96U
(1)
1.05U
(1)
ns
(1)
U = UART baud time = 1/programmed baud rate.
Table 7-112. Switching Characteristics Over Recommended Operating Conditions for PRU-ICSS UART
Transmit
(see
)
NO.
PARAMETER
MIN
MAX
UNIT
1
ƒ
baud(baud)
Maximum programmable baud rate
0
12
MHz
2
t
w(TX)
Pulse duration, transmit start, stop, data bit
U – 2
(1)
U + 2
(1)
ns
(1)
U = UART baud time = 1/programmed baud rate.
Figure 7-113. PRU-ICSS UART Timing
232
Peripheral Information and Timings
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