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参数资料
| 型号： | AT91R40008-66AU-999 |
| 厂商： | Atmel |
| 文件页数： | 3/19页 |
| 文件大小： | 0K |
| 描述： | IC MCU 32BIT RISC 100LQFP |
| 产品培训模块： | MCU Product Line Introduction |
| 标准包装： | 1,000 |
| 系列： | AT91 |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 66MHz |
| 连通性： | EBI/EMI，UART/USART |
| 外围设备： | POR，WDT |
| 输入/输出数： | 32 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 256K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 100-LQFP |
| 包装： | 带卷 (TR) |
| 配用： | AT91EB40A-ND - KIT EVAL FOR ARM AT91R40008 |
11
1732FS–ATARM–12-Apr-06
AT91R40008
8.
Peripherals
The AT91R40008 microcontroller peripherals are connected to the 32-bit wide Advanced
Peripheral Bus. Peripheral registers are only word accessible – byte and half-word accesses
are not supported. If a byte or a half-word access is attempted, the memory controller auto-
matically masks the lowest address bits and generates a word access.
Each peripheral has a 16-Kbyte address space allocated (the AIC only has a 4-Kbyte address
space).
8.0.1
Peripheral Registers
The following registers are common to all peripherals:
Control Register – write-only register that triggers a command when a one is written to the
corresponding position at the appropriate address. Writing a zero has no effect.
Mode Register – read/write register that defines the configuration of the peripheral. Usually
has a value of 0x0 after a reset.
Data Registers – read and/or write registers that enable the exchange of data between the
processor and the peripheral.
Status Register – read-only register that returns the status of the peripheral.
Enable/Disable/Status Registers are shadow command registers. Writing a one in the
Enable Register sets the corresponding bit in the Status Register. Writing a one in the
Disable Register resets the corresponding bit and the result can be read in the Status
Register. Writing a bit to zero has no effect. This register access method maximizes the
efficiency of bit manipulation and enables modification of a register with a single non-
interruptible instruction, replacing the costly read-modify-write operation.
Unused bits in the peripheral registers are shown as “–” and must be written at 0 for upward
compatibility. These bits read 0.
8.0.2
Peripheral Interrupt Control
The Interrupt Control of each peripheral is controlled from the Status Register using the inter-
rupt mask. The Status Register bits are ANDed to their corresponding interrupt mask bits and
the result is then ORed to generate the Interrupt Source signal to the Advanced Interrupt
Controller.
The interrupt mask is read in the Interrupt Mask Register and is modified with the Interrupt
Enable Register and the Interrupt Disable Register. The enable/disable/status (or mask)
makes it possible to enable or disable peripheral interrupt sources with a non-interruptible sin-
gle instruction. This eliminates the need for interrupt masking at the AIC or Core level in real-
time and multi-tasking systems.
8.0.3
Peripheral Data Controller
The AT91R40008 microcontroller has a 4-channel PDC dedicated to the two on-chip USARTs.
One PDC channel is dedicated to the receiver and one to the transmitter of each USART.
The user interface of a PDC channel is integrated in the memory space of each USART. It
contains a 32-bit Address Pointer Register (RPR or TPR) in addition to a 16-bit Transfer
Counter Register (RCR or TCR). When the programmed number of transfers are performed, a
status bit indicating the end of transfer is set in the USART Status Register and an interrupt
can be generated.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91R40807 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91R40807_02 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91R40807-33AC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| AT91R40807-33AI | 功能描述:ARM微控制器 - MCU LQFP IND TEMP RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
| AT91R40807-33AU | 功能描述:ARM微控制器 - MCU LQFP IND TEMP RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT |
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