參數(shù)資料
型號: PC8260
廠商: Atmel Corp.
英文描述: PowerPC-based Communications Processors
中文描述: 基于PowerPC的通信處理器
文件頁數(shù): 45/53頁
文件大?。?/td> 364K
代理商: PC8260
45
PC8260PowerQUICCII
2131B–HIREL–02/03
Notes:
1. InputspecificationsaremeasuredfromTTLlevel(0.8or2.0V)ofthesignaltothe1.4
leveloftherisingedgeofCLKIN.
2. Timingsaremeasuredatthepins.
Notes:
1. Outputspecificationsaremeasuredfromthe1.4VleveloftherisingedgeofCLKINto
theTTLlevel(0.8or2.0V)ofthesignal.
2. Timingsaremeasuredatthepin.
Activatingdatapipelining(settingBRx[DR]inthememorycontroller)improvestheAC
timing.Whendatapipeliningisactivated,sp12canbeusedfordatabussetupeven
whenECCorPARITYareused.Also,sp33acanbeusedastheACspecificationforDP
signals.
Table13.
ACCharacteristicsforSIUInputs
Spec_num
Characteristics
Setup(ns)
Hold(ns)
sp11/sp10
AACK/ARTRY/TA/TEA/DBG/BG/BR
6
1
sp12/sp10
DataBusinNormalmode
5
1
sp13sp10
DataBusinECCandPARITYModes
8
1
sp14/sp10
DPpins
8
1
sp15/sp10
AllOtherPins
5
1
Table14.
ACCharacteristicsforSIUOutputs
Spec_num
Characteristics
MaxDelay(ns)
MinDelay(ns)
sp31/sp30
PSDVAL/TEA/TA
10
1
sp32/sp30
ADD/ADD_atr./BADDR/CIGBL/WT
8
1
sp33a/sp30
DataBus
8
1
sp33b/sp30
DP
12
1
sp34/sp10
MemcSignals/ALE
6
1
sp35/sp10
AllOtherSignals
7
1
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