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参数资料
| 型号： | AT90S1200-4PI |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 8-BIT, FLASH, 4 MHz, RISC MICROCONTROLLER, PDIP20 |
| 封装： | 0.300 INCH, PLASTIC, DIP-20 |
| 文件页数： | 15/71页 |
| 文件大小： | 1416K |
| 代理商： | AT90S1200-4PI |
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15
AT90S1200
0838H
–
AVR
–
03/02
Figure 17.
Watchdog Reset during Operation
Interrupt Handling
The AT90S1200 has two Interrupt Mask Control Registers: the GIMSK (General Inter-
rupt Mask Register) at I/O space address $3B and the TIMSK (Timer/Counter Interrupt
Mask Register) at I/O address $39.
When an interrupt occurs, the Global Interrupt Enable I-bit is cleared (zero) and all inter-
rupts are disabled. The user software can set (one) the I-bit to enable interrupts. The I-
bit is set (one) when a Return from Interrupt instruction (RETI) is executed.
When the Program Counter is vectored to the actual interrupt vector in order to execute
the interrupt handling routine, hardware clears the corresponding flag that generated the
interrupt. Some of the interrupt flags can also be cleared by writing a logic one to the flag
bit position(s) to be cleared.
If an interrupt condition occurs when the corresponding interrupt enable bit is cleared
(zero), the interrupt flag will be set and remembered until the interrupt is enabled, or the
flag is cleared by software.
If one or more interrupt conditions occur when the global interrupt enable bit is cleared
(zero), the corresponding interrupt flag(s) will be set and remembered until the global
interrupt enable bit is set (one), and will be executed by order of priority.
Note that external level interrupt does not have a flag, and will only be remembered for
as long as the interrupt condition is active.
Note that the Status Register is not automatically stored when entering an interrupt rou-
tine and restored when returning from an interrupt routine. This must be handled by
software.
General Interrupt Mask
Register
–
GIMSK
Bit 7
–
Res: Reserved Bit
This bit is a reserved bit in the AT90S1200 and always reads as zero.
Bit
7
6
5
4
3
2
1
0
$3B
-
INT0
-
-
-
-
-
-
GIMSK
Read/Write
R
R/W
R
R
R
R
R
R
Initial Value
0
0
0
0
0
0
0
0
相关PDF资料 |
PDF描述 |
|---|---|
| AT90S1200-4SC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90S1200-4SI | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90S1200-4YC | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90S1200-4YI | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| AT90S1200A | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT90S1200-4SC | 功能描述:8位微控制器 -MCU 1k bit RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT90S1200-4SI | 功能描述:8位微控制器 -MCU 1K Flash 3V RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT90S1200-4YC | 功能描述:8位微控制器 -MCU 1K FLASH 3V RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT90S12004YCSL383 | 制造商:Atmel Corporation 功能描述:MCU 8-bit 90S AVR RISC 1KB Flash 3.3V/5V 20-Pin SSOP T/R |
| AT90S1200-4YI | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:8-Bit Microcontroller with 1K bytes In-System Programmable Flash |
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