參數(shù)資料
型號(hào): ADSP-21065LKSZ-264
廠商: Analog Devices Inc
文件頁數(shù): 17/44頁
文件大?。?/td> 0K
描述: IC DSP CONTROLL 544KBIT 208-MQFP
產(chǎn)品培訓(xùn)模塊: SHARC Processor Overview
標(biāo)準(zhǔn)包裝: 1
系列: SHARC®
類型: 浮點(diǎn)
接口: 主機(jī)接口,串行端口
時(shí)鐘速率: 60MHz
非易失內(nèi)存: 外部
芯片上RAM: 64kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 3.30V
工作溫度: 0°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 208-BFQFP
供應(yīng)商設(shè)備封裝: 208-MQFP(28x28)
包裝: 托盤
REV. C
ADSP-21065L
–24–
Asynchronous Read/Write—Host to ADSP-21065L
Use these specifications for asynchronous host processor accesses of an ADSP-21065L, after the host has asserted
CS and HBR
(low). After the ADSP-21065L returns
HBG, the host can drive the RD and WR pins to access the ADSP-21065L’s IOP registers.
HBR and HBG are assumed low for this timing. Writes can occur at a minimum interval of (1/2) t
CK.
Parameter
Min
Max
Unit
Read Cycle
Timing Requirements:
tSADRDL
Address Setup/CS Low Before RD Low*
0.0
ns
tHADRDH
Address Hold/
CS Hold Low After RD High
0.0
ns
tWRWH
RD/WR High Width
6.0
ns
tDRDHRDY
RD High Delay After REDY (O/D) Disable
0.0
ns
tDRDHRDY
RD High Delay After REDY (A/D) Disable
0.0
ns
Switching Characteristics:
tSDATRDY
Data Valid Before REDY Disable from Low
1.5
ns
tDRDYRDL
REDY (O/D) or (A/D) Low Delay After
RD Low
13.5
ns
tRDYPRD
REDY (O/D) or (A/D) Low Pulsewidth for Read
28.0 + DT
ns
tHDARWH
Data Disable After
RD High
2.0
10.0
ns
Write Cycle
Timing Requirements:
tSCSWRL
CS Low Setup Before WR Low
0.0
ns
tHCSWRH
CS Low Hold After WR High
0.0
ns
tSADWRH
Address Setup Before
WR High
5.0
ns
tHADWRH
Address Hold After
WR High
2.0
ns
tWWRL
WR Low Width
7.0
ns
tWRWH
RD/WR High Width
6.0
ns
tDWRHRDY
WR High Delay After REDY (O/D) or (A/D) Disable
0.0
ns
tSDATWH
Data Setup Before
WR High
5.0
ns
tHDATWH
Data Hold After
WR High
1.0
ns
Switching Characteristics:
tDRDYWRL
REDY (O/D) or (A/D) Low Delay After
WR/CS Low
13.5
ns
tRDYPWR
REDY (O/D) or (A/D) Low Pulsewidth for Write
7.75
ns
NOTE
*Not required if RD and address are valid tHBGRCSV after HBG goes low. For first access after HBR asserted, ADDR23-0 must be a nonMMS value 1/2 tCLK before
RD or WR goes low or by t
HBGRCSV after HBG goes low. This is easily accomplished by driving an upper address signal high when HBG is asserted. See Host Inter-
face, in the ADSP-21065L SHARC User’s Manual, Second Edition.
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