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參數(shù)資料
| 型號： | EP7309-IR-C |
| 廠商： | CIRRUS LOGIC INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
| 中文描述： | 32-BIT, FLASH, 74 MHz, RISC MICROCONTROLLER, PBGA204 |
| 封裝： | 13 X 13 MM, TFBGA-204 |
| 文件頁數(shù)： | 15/46頁 |
| 文件大小： | 1893K |
| 代理商： | EP7309-IR-C |
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DS507PP1
Copyright 2001 Cirrus Logic (All Rights Reserved)
15
EP7309
High-Performance, Low-Power System on Chip
Static Memory Burst Read Cycle
Note:
1. Four cycles are shown in the above diagram (minimum wait states, 1-0-0-0). This is the maximum number of consecutive
cycles that can be driven. The number of consecutive cycles can be programmed from 2 to 4, inclusively.
2. The cycle time can be extended by integer multiples of the clock period (27 ns at 36 MHz, 54 ns at 18.432 MHz, and
77 ns at 13 MHz), by either driving EXPRDY low and/or by programming a number of wait states. EXPRDY is sampled on
the falling edge of EXPCLK before the data transfer. If low at this point, the transfer is delayed by one clock period where
EXPRDY is sampled again. EXPCLK need not be referenced when driving EXPRDY, but is shown for clarity.
3. Consecutive reads with sequential access enabled are identical except that the sequential access wait state field is used to
determine the number of wait states, and no idle cycles are inserted between successive non-sequential ROM/expansion
cycles. This improves performance so the SQAEN bit should always be set where possible.
Figure 4. Static Memory Burst Read Cycle Timing Measurement
EXPCLK
nCS
A
nMOE
HALF
WORD
WORD
D
nMWE
EXPRDY
WRITE
t
CSd
t
Ad
t
Ah
t
Ah
t
Ah
t
CSh
t
MOEh
t
MOEd
t
EXs
t
EXh
t
Ds
t
Dh
t
Ds
t
Ds
t
Ds
t
Dh
t
Dh
t
Dh
t
WRd
t
HWd
t
WDd
相關PDF資料 |
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| EP7309-IV-C | HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
| EP7311-CB-C | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7311-CR-C | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| EP7309-IV-C | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
| EP7309-IVZ | 制造商:Cirrus Logic 功能描述: |
| EP7309M-CBZ | 制造商:Cirrus Logic 功能描述:I/C ULTRA LOW POWER AUDIO DECODE SOC - Trays |
| EP7309M-CVZ | 功能描述:音頻片上系統(tǒng) - SoC IC Hgh-Prfrmnc Low- Power SOC w/SDRAM RoHS:否 制造商:Cirrus Logic |
| EP7311 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:High-performance, Low-power, System-on-chip with SDRAM & Enhanced Digital Audio Interface |
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