参数资料
| 型号： | EP7312-CV |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 54/54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，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 |
| 配用： | 598-1209-ND - KIT DEVELOPMENT EP73XX ARM7 |
| 其它名称： | 598-1237 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页当前第54页
DS508F2
Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved)
9
EP7312
High-Performance, Low-Power System on Chip
strobes for each keyboard column signal. The pins of Port A,
when configured as inputs, can be selectively OR'ed together
to provide a keyboard interrupt that is capable of waking the
system from a STANDBY or IDLE state. The Keypad
Interface has these features:
Column outputs can be individually set high with the
remaining bits left at high-impedance
Column outputs can be driven all-low, all-high, or all-high-
impedance
Keyboard interrupt driven by OR'ing together all Port A
bits
Keyboard interrupt can be used to wake up the system
8
8 keyboard matrix usable with no external logic, extra
keys can be added with minimal glue logic
Table 10 shows the Keypad Interface Pin Assignments.
Interrupt Controller
When unexpected events arise during the execution of a
program (i.e., interrupt or memory fault) an exception is
usually generated. When these exceptions occur at the same
time, a fixed priority system determines the order in which
they are handled. The EP7312 interrupt controller has two
interrupt types: interrupt request (IRQ) and fast interrupt
request (FIQ). The interrupt controller has the ability to control
interrupts from 22 different FIQ and IRQ sources. The
Interrupt controller has these features:
Supports 22 interrupts from a variety of sources (such as
UARTs, SSI1, and key matrix.)
Routes interrupt sources to the ARM720T’s IRQ or FIQ
(Fast IRQ) inputs
Five dedicated off-chip interrupt lines operate as level
sensitive interrupts
Table 11 shows the interrupt controller pin assignments.
.
Note:
Pins are multiplexed. See Table 19 on page 11 for
more information.
Real-Time Clock
The EP7312 contains a 32-bit Real Time Clock (RTC) that can
be written to and read from in the same manner as the timer
counters. It also contains a 32-bit output match register which
can be programmed to generate an interrupt.
Driven by an external 32.768 kHz crystal oscillator
Table 12 shows the Real-Time Clock pin assignments.
PLL and Clocking
The EP7312 processor and peripheral clocks have these
features:
Processor and peripheral clocks operate from a single
3.6864 MHz crystal or external 13 MHz clock
Programmable clock speeds allow the peripheral bus to run
at 18 MHz when the processor is set to 18 MHz and at
36 MHz when the processor is set to 36, 49 or 74 MHz, and
at 45 MHz when the processor is set to 90 MHz.
Table 13 shows the PLL and clocking pin assignments.
Table 10. Keypad Interface Pin Assignments
Pin Mnemonic
I/O
Pin Description
COL[7:0]
O
Keyboard scanner column
drive
Table 11. Interrupt Controller Pin Assignments
Pin Mnemonic
I/O
Pin Description
nEINT[2:1]
I
External interrupt
EINT[3]
I
External interrupt
nEXTFIQ
I
External Fast Interrupt input
nMEDCHG/nBROM
(Note)
I
Media change interrupt input
Table 12. Real-Time Clock Pin Assignments
Pin Mnemonic
Pin Description
RTCIN
Real-Time Clock Oscillator Input
RTCOUT
Real-Time Clock Oscillator Output
VDDRTC
Real-Time Clock Oscillator Power
VSSRTC
Real-Time Clock Oscillator Ground
Table 13. PLL and Clocking Pin Assignments
Pin Mnemonic
Pin Description
MOSCIN
Main Oscillator Input
MOSCOUT
Main Oscillator Output
VDDOSC
Main Oscillator Power
VSSOSC
Main Oscillator Ground
相关PDF资料 |
PDF描述 |
|---|---|
| 201692-6 | CONN PLUG BLOCK 104POS BLACK |
| EP7312-CR-90 | IC ARM720T MCU 90MHZ 204-TFBGA |
| EP7312-CR | IC ARM720T MCU 74MHZ 204-TFBGA |
| 201692-3 | CTR FASTERNER PLUG BLOCK,104P |
| 1-201692-1 | CONN PLUG 104 POS MINI M SERIES |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EP7312-CV-90 | 功能描述:IC ARM720T MCU 90MHZ 208-LQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:EP7 标准包装:1,500 系列:AVR® ATtiny 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C，LIN，SPI，UART/USART，USI 外围设备:欠压检测/复位，POR，PWM，温度传感器，WDT 输入/输出数:16 程序存储器容量:8KB（4K x 16） 程序存储器类型:闪存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 11x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 包装:带卷 (TR) |
| EP7312-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 |
| EP7312-CVZ | 功能描述:音频片上系统 - SoC IC Hgh-Prfrmnc Low- Power SOC w/SDRAM RoHS:否 制造商:Cirrus Logic |
| EP7312-CVZ-90 | 功能描述:音频片上系统 - SoC IC Hgh-Prfrmnc Low- Power SOC w/SDRAM RoHS:否 制造商:Cirrus Logic |
| EP7312-CVZR | 功能描述:音频片上系统 - SoC IC Hgh-Prfrmnc Low- Power SOC w/SDRAM RoHS:否 制造商:Cirrus Logic |
发布紧急采购，3分钟左右您将得到回复。