SDRAM read SDRAM read, CAS latency = 1 Notes: 1 Port size determines which byte enable sign" />
參數(shù)資料
型號(hào): NS7520B-1-I55
廠商: Digi International
文件頁數(shù): 41/68頁
文件大小: 0K
描述: IC ARM MICROPROCESSOR 177BGA
標(biāo)準(zhǔn)包裝: 160
系列: NET+ARM®
應(yīng)用: 網(wǎng)絡(luò)處理器
核心處理器: ARM7
程序存儲(chǔ)器類型: 外部程序存儲(chǔ)器
RAM 容量: 外部
接口: EBI/EMI,以太網(wǎng),DMA,SPI,UART
輸入/輸出數(shù): 16
電源電壓: 1.4 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 177-LFBGA
包裝: 托盤
供應(yīng)商設(shè)備封裝: 177-BGA(13x13)
SDR A M ti ming
42
NS 93 60 Da ta shee t
03 /2 00 6
SDRAM read
SDRAM read, CAS latency = 1
Notes:
1
Port size determines which byte enable signals are active:
8-bit port = BE3*
16-bit port = BE[3:2]
32-bit port = BE[3:0]
2
The precharge and/or active commands are not always present. These commands depend on
the address of the previous SDRAM access.
3
The TA* and TEA*/LAST signals are for reference only.
T1
T2
T1
prechg
active
read
bterm
inhibit
12
34
27
36
35
6
37
31
30
11
10
A10
BCLK
TA* (Note-3)
TEA*/LAST* (Note-3)
PortA2/AMUX
Non-muxed address
Muxed address
BE[3:0]* (DQM)
read D[31:0]
CS[4:0]*
CAS3* (RAS#)
CAS2* (CAS#)
CAS1* (WE#)
CAS0* (A10/AP)
RW*
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