參數(shù)資料
型號: TMX320C6412GNZ
廠商: Texas Instruments, Inc.
英文描述: Signal Processor
中文描述: 信號處理器
文件頁數(shù): 150/159頁
文件大小: 1989K
代理商: TMX320C6412GNZ
Ethernet Media Access Controller (EMAC) Timing
150
April 2003 Revised June 2004
SPRS219D
Table 163. Timing Requirements for EMAC MII Receive 10/100 Mbit/s
(see Figure 163)
NO.
500
600
UNIT
MIN
MAX
1
tsu(MRXD-MRCLKH)
th(MRCLKH-MRXD)
Receive selected signals include: MRXD3MRXD0, MRXDV, and MRXER.
Setup time, receive selected signals valid before MRCLK high
8
ns
2
Hold time, receive selected signals valid after MRCLK high
8
ns
MRXD3MRXD0 is driven by the PHY on the falling edge of MRCLK. MRXD3MRXD0 timing must be met
during clock periods when MRXDV is asserted. MRXDV is asserted and deasserted by the PHY on the falling
edge of MRCLK. MRXER is driven by the PHY on the falling edge of MRCLK (xx = 0001).
MRCLK (Input)
1
2
MRXD3MRXD0,
MRXDV, MRXER (Inputs)
Figure 163. EMAC Receive Interface Timing
Table 164. Switching Characteristics Over Recommended Operating Conditions for EMAC
MII Transmit 10/100 Mbit/s
(see Figure 164)
NO.
500
600
UNIT
MIN
MAX
1
td(MTCLKH-MTXD)
Transmit selected signals include: MTXD3MTXD0, and MTXEN.
Delay time, MTCLK high to transmit selected signals valid
5
25
ns
MTXD3MTXD0 is driven by the reconciliation sublayer synchronous to the MTCLK. MTXEN is asserted and
deasserted by the reconciliation sublayer synchronous to the MTCLK rising edge.
1
MTCLK (Input)
MTXD3MTXD0,
MTXEN (Outputs)
Figure 164. EMAC Transmit Interface Timing
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