参数资料
| 型号： | EP7311-CV-90 |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 20/42页 |
| 文件大小： | 0K |
| 描述： | IC ARM720T MCU 90MHZ 208-LQFP |
| 标准包装： | 36 |
| 系列： | EP7 |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 32-位 |
| 速度： | 90MHz |
| 连通性： | 编解码器，EBI/EMI，IrDA，键盘，多媒体编解码器，SPI/Microwire1，UART/USART |
| 外围设备： | LCD，LED，MaverickKey，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： | 598-1225 |
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27
4341H–MP3–10/07
AT8xC51SND2C/MP3B
in standard mode or 6 oscillator clock periods in X2 mode. For further information on X2 mode,
refer to the Section “X2 Feature”, page 14.
Slow peripherals can be accessed by stretching the read and write cycles. This is done using the
M0 bit in AUXR register. Setting this bit changes the width of the RD and WR signals from 3 to
15 CPU clock periods.
For simplicity, Figure 7-4 and Figure 7-5 depict the bus cycle waveforms in idealized form and
do not provide precise timing information. For bus cycle timing parameters refer to the Section
“AC Characteristics”.
Figure 7-4.
External Data Read Waveforms
Notes:
1. RD signal may be stretched using M0 bit in AUXR register.
2. When executing MOVX @Ri instruction, P2 outputs SFR content.
3. When executing MOVX @DPTR instruction, if DPHDIS is set (Page Access Mode), P2 out-
puts SFR content instead of DPH.
Figure 7-5.
External Data Write Waveforms
Notes:
1. WR signal may be stretched using M0 bit in AUXR register.
2. When executing MOVX @Ri instruction, P2 outputs SFR content.
3. When executing MOVX @DPTR instruction, if DPHDIS is set (Page Access Mode), P2 out-
puts SFR content instead of DPH.
7.3
Dual Data Pointer
7.3.1
Description
The AT8xC51SND2C implement a second data pointer for speeding up code execution and
reducing code size in case of intensive usage of external memory accesses.
ALE
P0
P2
RD
(1)
DPL or Ri
D7:0
DPH or P2(2),(3)
P2
CPU Clock
ALE
P0
P2
WR
(1)
DPL or Ri
D7:0
P2
CPU Clock
DPH or P2(2),(3)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EP7311-CV-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7311-EB-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7311-ER-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7311-EV-C | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7311-IB | 功能描述:音频片上系统 - SoC IC Ultra Low PWR Hi Perf SOC w/LCD RoHS:否 制造商:Cirrus Logic |
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