參數(shù)資料
型號： EP7311-CV-90
廠商： Cirrus Logic Inc
文件頁數(shù)： 20/42頁
文件大?。?/td> 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
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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相關代理商/技術參數(shù)
參數(shù)描述
EP7311-CV-C 制造商:CIRRUS 制造商全稱: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 制造商全稱: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 制造商全稱: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 制造商全稱: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:音頻片上系統(tǒng) - SoC IC Ultra Low PWR Hi Perf SOC w/LCD RoHS:否 制造商:Cirrus Logic
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