Copyright Cirrus Logic, Inc. 2011 (All Rights Reserved) DS506F2 EP7311 High-Performance, Low-Power S" />
參數(shù)資料
型號: EP7311-CV-90
廠商: Cirrus Logic Inc
文件頁數(shù): 13/42頁
文件大小: 0K
描述: IC ARM720T MCU 90MHZ 208-LQFP
標準包裝: 36
系列: EP7
核心處理器: ARM7
芯體尺寸: 32-位
速度: 90MHz
連通性: 編解碼器,EBI/EMI,IrDA,鍵盤,多媒體編解碼器,SPI/Microwire1,UART/USART
外圍設備: LCD,LED,MaverickKey,PWM
輸入/輸出數(shù): 27
程序存儲器類型: ROMless
RAM 容量: 56K x 8
電壓 - 電源 (Vcc/Vdd): 2.3 V ~ 2.7 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 208-LQFP
包裝: 托盤
其它名稱: 598-1225
20
Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved)
DS506F2
EP7311
High-Performance, Low-Power System on Chip
SDRAM Refresh Cycle
Note:
1. Timings are shown with CAS latency = 2
2. The SDCLK signal may be phase shifted relative to the rest of the SDRAM control and data signals due to uneven loading.
Designers should take care to ensure that delays between SDRAM control and data signals are approximately equal
SDCLK
SDCS
SDRAS
SDCAS
SDQM
[3:0]
SDMWE
SDATA
ADDR
t
CSa
t
RAa
t
CSd
t
RAd
t
CAa
t
CAd
Figure 6. SDRAM Refresh Cycle Timing Measurement
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