AM1705 Datasheet, PDF (81/155 Pages) Texas Instruments – AM1705 ARM Microprocessor

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HEX ADDRESS RANGE
0x01E2 0000 - 0x01E2 1FFF
Table 6-34. EMAC Control Module RAM
EMAC Local Buffer Descriptor Memory
Table 6-35. RMII Timing Requirements
No.
PARAMETER
MIN
1 tc(REFCLK)
Cycle Time, REF_CLK
2 tw(REFCLKH)
Pulse Width, REF_CLK High
7
3 tw(REFCLKL)
Pulse Width, REF_CLK Low
7
6 tsu(RXD-REFCLK) Input Setup Time, RXD Valid before REF_CLK High
4
7 th(REFCLK-RXD)
Input Hold Time, RXD Valid after REF_CLK High
2
8 tsu(CRSDV-REFCLK) Input Setup Time, CRSDV Valid before REF_CLK High
4
9 th(REFCLK-CRSDV) Input Hold Time, CRSDV Valid after REF_CLK High
2
10 tsu(RXER-REFCLK) Input Setup Time, RXER Valid before REF_CLK High
4
11 th(REFCLKR-RXER) Input Hold Time, RXER Valid after REF_CLK High
2
No.
4 td(REFCLK-TXD)
5 td(REFCLK-TXEN)
Table 6-36. RMII Timing Requirements
PARAMETER
MIN
Output Delay Time, REF_CLK High to TXD Valid
2.5
Output Delay Time, REF_CLK High to TXEN Valid
2.5
1
RMII_MHz_50_CLK
23
5
RMII_TXEN
RMII_TXD[1:0]
RMII_RXD[1:0]
RMII_CRS_DV
RMII_RXER
4
8
6
7
9
10
11
Figure 6-25. RMII Timing Diagram
AM1705
SPRS657 – FEBRUARY 2010
TYP
MAX
UNIT
20
ns
13
ns
13
ns
ns
ns
ns
ns
ns
ns
TYP
MAX
UNIT
13
ns
13
ns
5
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Peripheral Information and Electrical Specifications
81
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