參數(shù)資料
型號： SPC5121YVY400BR
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： RISC PROCESSOR, PBGA516
封裝： 27 X 27 MM, 2.25 MM HEIGHT, 1 MM PITCH, ROHS COMPLIANT, PLASTIC, TFBGA-516
文件頁數(shù)： 46/86頁
文件大?。?/td> 719K
代理商： SPC5121YVY400BR
MPC5121E/MPC5123 Data Sheet, Rev. 3
Electrical and Thermal Characteristics
Freescale Semiconductor
50
3.3.9.4
UDMA In Timing Diagrams
UDMA mode timing is more complicated than PIO mode or MDMA mode. In this section, timing diagrams for UDMA in are
given:
Figure 28 gives timing for UDMA in transfer start
Figure 29 gives timing for host terminating UDMA in transfer
Figure 30 gives timing for device terminating UDMA in transfer.
Table 3-28. Timing Parameters MDMA Read and Write
ATA
Parameter
MDMA
Read/Write
Timing
Parameter
Value
How to meet
SpecID
tm, ti
tm
tm(min) = ti(min) = time_m * T – (tskew1 + tskew2 + tskew5)
calculate and
programming
time_m, see
Reference Manual
A9.40
td
td, td1
td1(min) = td(min) = time_d * T – (tskew1 + tskew2 + tskew6)
calculate and
programming
time_d, see
Reference Manual
A9.41
tk
tk(min) = time_k * T – (tskew1 + tskew2 + tskew6)
calculate and
programming
time_k, see
Reference Manual
A9.42
t0
—
t0(min) = (time_d + time_k) * T
time_d, time_k
A9.43
tg(read)
tgr
tgr(min-read) = tco + tsu + tbuf + tbuf + tcable1 + tcable2
tgr(min-drive) = td – te(drive)
time_d, see
Reference Manual
A9.44
tf(read)
tfr
tfr(min-drive) =0
—
A9.45
tg(write)
—
tg(min-write) = time_d * T –(tskew1 + tskew2 + tskew5)
time_d
A9.46
tf(write)
—
tf(min-write) = time_k * T –(tskew1 + tskew2 + tskew6)
time_k
A9.47
tL
—
tL(max) = (time_d + time_k-2)*T – (tsu + tco + 2*tbuf +
2*tcable2)
time_d, time_k
A9.48
tn, tj
tkjn
tn= tj= tkjn = (max(time_k,. time_jn) * T –(tskew1 + tskew2 +
tskew6)
calculate and
programming
time_jn, see
Reference Manual
A9.49
—ton
toff
ton = time_on * T – tskew1
toff = time_off * T – tskew1
—
A9.50
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