参数资料
型号: AT91RM9200-QI-002
厂商: Atmel
文件页数: 11/41页
文件大小: 0K
描述: IC ARM9 MCU 208 PQFP
标准包装: 24
系列: AT91
核心处理器: ARM9
芯体尺寸: 16/32-位
速度: 180MHz
连通性: EBI/EMI,以太网,I²C,MMC,SPI,SSC,UART/USART,USB
外围设备: POR
输入/输出数: 122
程序存储器容量: 128KB(128K x 8)
程序存储器类型: ROM
RAM 容量: 48K x 8
电压 - 电源 (Vcc/Vdd): 1.65 V ~ 1.95 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 208-MQFP,208-PQFP
包装: 托盘
19
1768MS–ATARM–09-Jul-09
AT91RM9200
9.
System Peripherals
A complete memory map is shown in Figure 8-1 on page 17.
9.1
Reset Controller
Two reset input lines (NRST and NTRST) providing, respectively:
Initialization of the User Interface registers (defined in the user interface of each peripheral)
and:
– Sample the signals needed at bootup
– Compel the processor to fetch the next instruction at address zero
Initialization of the embedded ICE TAP controller
9.2
Advanced Interrupt Controller
Controls the interrupt lines (nIRQ and nFIQ) of an ARM Processor
Thirty-two individually maskable and vectored interrupt sources
– Source 0 is reserved for the Fast Interrupt Input (FIQ)
– Source 1 is reserved for system peripherals (ST, RTC, PMC, DBGU…)
– Source 2 to Source 31 control thirty embedded peripheral interrupts or external
interrupts
– Programmable Edge-triggered or Level-sensitive Internal Sources
– Programmable Positive/Negative Edge-triggered or High/Low Level-sensitive
External Sources
8-level Priority Controller
– Drives the Normal Interrupt of the processor
– Handles priority of the interrupt sources 1 to 31
– Higher priority interrupts can be served during service of lower priority interrupt
Vectoring
– Optimizes Interrupt Service Routine Branch and Execution
– One 32-bit Vector Register per interrupt source
– Interrupt Vector Register reads the corresponding current Interrupt Vector
Protect Mode
– Easy debugging by preventing automatic operations
General Interrupt Mask
– Provides processor synchronization on events without triggering an interrupt
9.3
Power Management Controller
Optimizes the power consumption of the whole system
Embeds and controls:
– One Main Oscillator and One Slow Clock Oscillator (32.768Hz)
– Two Phase Locked Loops (PLLs) and Dividers
– Clock Prescalers
Provides:
– the Processor Clock PCK
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