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| 型号： | AT91SAM7SE32B-CU |
| 厂商： | Atmel |
| 文件页数： | 7/47页 |
| 文件大小： | 0K |
| 描述： | IC MCU ARM7 32KB FLASH 144LFBGA |
| 标准包装： | 240 |
| 系列： | SAM7SE |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 55MHz |
| 连通性： | EBI/EMI，I²C，SPI，SSC，UART/USART，USB |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 88 |
| 程序存储器容量： | 32KB（32K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 8K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 数据转换器： | A/D 8x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 144-LFBGA |
| 包装： | 托盘 |
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15
6222GS–ATARM–6-Sep-11
SAM7SE512/256/32 Summary
6.
/O Lines Considerations
6.1
JTAG Port Pins
TMS, TDI and TCK are Schmitt trigger inputs. TMS, TDI and TCK do not integrate a pull-up
resistor.
TDO is an output, driven at up to VDDIO, and has no pull-up resistor.
The JTAGSEL pin is used to select the JTAG boundary scan when asserted at a high level. The
JTAGSEL pin integrates a permanent pull-down resistor of about 15 k
Ω.
To eliminate any risk of spuriously entering the JTAG boundary scan mode due to noise on
JTAGSEL, it should be tied externally to GND if boundary scan is not used, or put in place an
external low value resistor (such as 1 k
Ω) .
6.2
Test Pin
Th e T S T p i n is used f o r ma nu f a ct ur in g t e st o r f a st pr og ra mmi ng mod e of t h e
SAM7SE512/256/32 when asserted high. The TST pin integrates a permanent pull-down resis-
tor of about 15 k
Ω to GND.
To eliminate any risk of entering the test mode due to noise on the TST pin, it should be tied to
GND if the FFPI is not used, or put in place an external low value resistor (such as 1 k
Ω) .
To enter fast programming mode, the TST pin and the PA0 and PA1 pins should be tied high
and PA2 tied low.
Driving the TST pin at a high level while PA0 or PA1 is driven at 0 leads to unpredictable results.
6.3
Reset Pin
The NRST pin is bidirectional with an open-drain output buffer. It is handled by the on-chip reset
controller and can be driven low to provide a reset signal to the external components or asserted
low externally to reset the microcontroller. There is no constraint on the length of the reset pulse,
and the reset controller can guarantee a minimum pulse length. This allows connection of a sim-
ple push-button on the NRST pin as system user reset, and the use of the NRST signal to reset
all the components of the system.
An external power-on reset can drive this pin during the start-up instead of using the internal
power-on reset circuit.
The NRST pin integrates a permanent pull-up of about 100 k
Ω resistor to VDDIO.
This pin has Schmitt trigger input.
6.4
ERASE Pin
The ERASE pin is used to re-initialize the Flash content and some of its NVM bits. It integrates a
permanent pull-down resistor of about 15 k
Ω to GND.
To eliminate any risk of erasing the Flash due to noise on the ERASE pin, it should be tied exter-
nally to GND, which prevents erasing the Flash from the application, or put in place an external
low value resistor (such as 1 k
Ω) .
This pin is debounced by the RC oscillator to improve the glitch tolerance. When the pin is tied to
high during less than 100 ms, ERASE pin is not taken into account. The pin must be tied high
during more than 220 ms to perform the re-initialization of the Flash.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91SAM7SE32B-CUR | 功能描述:ARM微控制器 - MCU BGA Grn IT MRLB 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 |
| AT91SAM7SE32-CU | 功能描述:ARM微控制器 - MCU BGA 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 |
| AT91SAM7SE32-CU-999 | 功能描述:ARM微控制器 - MCU BGA Ind. Temp Green 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 |
| AT91SAM7SE512 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Thumb-based Microcontrollers |
| AT91SAM7SE512_08 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Incorporates the ARM7TDMI ARM Thumb Processor |
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