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参数资料
| 型号： | EP7309-CVZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 11/42页 |
| 文件大小： | 0K |
| 描述： | IC ARM720T MCU 74MHZ 208-LQFP |
| 标准包装： | 36 |
| 系列： | EP7 |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 32-位 |
| 速度： | 74MHz |
| 连通性： | 编解码器，DAI，EBI/EMI，IrDA，键盘，SPI/Microwire1，UART/USART |
| 外围设备： | LCD，LED，MaverickKey，POR，PWM |
| 输入/输出数： | 27 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 56K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.3 V ~ 2.7 V |
| 振荡器型： | 外部 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 208-LQFP |
| 包装： | 托盘 |
| 其它名称： | 598-1214 |
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DS507F2
Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved)
19
EP7309
High-Performance, Low-Power System on Chip
Static Memory Burst Write Cycle
Note:
1. Four cycles are shown in the above diagram (minimum wait states, 1-1-1-1). 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 (22 ns at 45 MHz, 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. Zero wait states for sequential writes is not permitted for memory devices which use nMWE pin, as this cannot be driven with
valid timing under zero wait state conditions.
4. Address, Data, Halfword, Word, and Write hold state until next cycle.
EXPCLK
nCS
A
nM OE
HALF
WORD
D
nM W E
EXPRDY
WRITE
t
CSd
t
Ad
t
MW d
t
MW h
t
MW d
t
MW d
t
MW d
t
MW h
t
MW h
t
MW h
t
Ah
t
Ah
t
Ah
t
EXs
t
EXh
t
CSh
t
Dv
t
Dv
t
Dv
t
Dnv
t
Dnv
t
Dnv
t
Dv
t
HW d
t
WDd
Figure 6. Static Memory Burst Write Cycle Timing Measurement
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EP7309-EB-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
| EP7309-ER-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
| EP7309-EV-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
| EP7309-IB | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:High-performance, Low-power, System-on-chip with Enhanced Digital Audio Interface |
| EP7309-IB-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE |
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