- 您现在的位置：买卖IC网 > PDF目录11790 > AT91M42800A-33CJ-999 (Atmel)IC MCU 32BIT RISC 144BGA PDF资料下载
参数资料
| 型号： | AT91M42800A-33CJ-999 |
| 厂商： | Atmel |
| 文件页数： | 5/27页 |
| 文件大小： | 0K |
| 描述： | IC MCU 32BIT RISC 144BGA |
| 标准包装： | 1 |
| 系列： | AT91 |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 33MHz |
| 连通性： | EBI/EMI，SPI，UART/USART |
| 外围设备： | POR，WDT |
| 输入/输出数： | 54 |
| 程序存储器类型： | ROMless |
| RAM 容量： | 8K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 144-LFBGA |
| 包装： | 剪切带 (CT) |
| 其它名称： | AT91M42800A-33CJ-999CT |
第1页第2页第3页第4页当前第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
13
1779ES–ATARM–14-Apr-06
AT91M42800A
Figure 7-1.
Seperate or Common Reset Management
Notes:
1. NRST and NTRST handling in Debug Mode during development.
2. NRST and NTRST handling during production.
In order to benefit from the separation of NRST and NTRST during the debug phase of develop-
ment, the user must independently manage both signals as shown in example (1) of Figure 7-1
above. However, once debug is completed, both signals are easily managed together during
production as shown in example (2) of Figure 7-1 above.
7.5.3
Watchdog Reset
The internally generated watchdog reset has the same effect as the NRST pin, except that the
pins BMS and NTRI are not sampled. Boot mode and Tri-state mode are not updated. The
NRST pin has priority if both types of reset coincide.
7.6
Emulation Functions
7.6.1
Tri-state Mode
The AT91M42800A provides a Tri-state mode, which is used for debug purposes in order to
connect an emulator probe to an application board. In Tri-state mode the AT91M42800A contin-
ues to function, but all the output pin drivers are tri-stated.
To enter Tri-state mode, the pin NTRI must be held low during the last 10 SLCK clock cycles
before the rising edge of NRST. For normal operation, the pin NTRI must be held high during
reset, by a resistor of up to 400 k
. NTRI must be driven to a valid logic value during reset.
NTRI is multiplexed with Parallel I/O PA9 and USART 1 serial data transmit line TXD1.
Standard RS232 drivers generally contain internal 400 k
pull-up resistors. If TXD1 is connected
to one of these drivers, this pull-up will ensure normal operation, without the need for an addi-
tional external resistor.
7.6.2
Embedded ICE
ARM standard embedded in-circuit emulation is supported via the JTAG/ICE port. It is con-
nected to a host computer via an embedded ICE Interface.
Embedded ICE mode is selected when MODE1 is low.
It is not possible to switch directly between ICE and JTAG operations. A chip reset must be per-
formed (NRST and NTRST) after MODE0 and/or MODE1 have/has been changed. The reset
input to the Embedded ICE (NTRST) is provided separately to facilitate debug of boot programs.
(1)
(2)
Reset
Controller
Reset
Controller
Reset
Controller
NTRST
NRST
NTRST
NRST
AT91M42800A
相关PDF资料 |
PDF描述 |
|---|---|
| VI-BTJ-IW-F2 | CONVERTER MOD DC/DC 36V 100W |
| VI-BTH-IX-F3 | CONVERTER MOD DC/DC 52V 75W |
| MAX1840EUB+ | IC TRANS LEVEL SIM 10-UMAX |
| VI-BTH-IX-F2 | CONVERTER MOD DC/DC 52V 75W |
| DS8023-RJX+ | IC INTERFACE SMART CARD 28-TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91M43300 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers |
| AT91M43300-12CC-1.8 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers |
| AT91M43300-12CI-1.8 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers |
| AT91M43300-25CC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:ARM Thumb Microcontrollers |
| AT91M43300-25CI | 功能描述:IC ARM7 MCU 144 BGA RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:AT91 标准包装:9 系列:87C 核心处理器:8051 芯体尺寸:8-位 速度:40/20MHz 连通性:UART/USART 外围设备:POR，WDT 输入/输出数:32 程序存储器容量:32KB（32K x 8） 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:- 振荡器型:内部 工作温度:0°C ~ 70°C 封装/外壳:40-DIP（0.600"，15.24mm） 包装:管件 |
发布紧急采购，3分钟左右您将得到回复。