参数资料
型号: MC8640DTHX1250HE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1250 MHz, MICROPROCESSOR, CBGA1023
封装: 33 X 33 MM, CERAMIC, FCBGA-1023
文件页数: 59/130页
文件大小: 1495K
代理商: MC8640DTHX1250HE
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
34
Freescale Semiconductor
Ethernet: Enhanced Three-Speed Ethernet (eTSEC), MII Management
8.2.4.1
TBI Transmit AC Timing Specifications
Table 32 provides the TBI transmit AC timing specifications.
Table 32. TBI Transmit AC Timing Specifications
At recommended operating conditions with L/TVDD of 3.3 V ± 5% and 2.5 V ± 5%.
Parameter
Symbol 1
Min
Typ
Max
Unit
TCG[9:0] setup time GTX_CLK going high
tTTKHDV
2.0
ns
TCG[9:0] hold time from GTX_CLK going high
tTTKHDX
1.0
ns
GTX_CLK rise time (20%–80%)
tTTXR
2
——
1.0
ns
GTX_CLK fall time (80%–20%)
tTTXF
2
——
1.0
ns
Notes:
1. The symbols used for timing specifications herein follow the pattern of t(first two letters of functional block)(signal)(state )(reference)(state)
for inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tTTKHDV symbolizes the TBI
transmit timing (TT) with respect to the time from tTTX (K) going high (H) until the referenced data signals (D) reach the valid
state (V) or setup time. Also, tTTKHDX symbolizes the TBI transmit timing (TT) with respect to the time from tTTX (K) going high
(H) until the referenced data signals (D) reach the invalid state (X) or hold time. Note that, in general, the clock reference
symbol representation is based on three letters representing the clock of a particular functional. For example, the subscript
of tTTX represents the TBI (T) transmit (TX) clock. For rise and fall times, the latter convention is used with the appropriate
letter: R (rise) or F (fall).
2. Guaranteed by design.
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