參數資料
| 型號： | AT89LP4052-20PU |
| 廠商： | Atmel |
| 文件頁數： | 8/94頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 8051 MCU FLASH 4K 20DIP |
| 產品培訓模塊： | MCU Product Line Introduction |
| 標準包裝： | 18 |
| 系列： | 89LP |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 20MHz |
| 連通性： | SPI，UART/USART |
| 外圍設備： | 欠壓檢測/復位，POR，PWM，WDT |
| 輸入/輸出數： | 15 |
| 程序存儲器容量： | 4KB（4K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 256 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.4 V ~ 5.5 V |
| 振蕩器型： | 內部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 20-DIP（0.300"，7.62mm） |
| 包裝： | 管件 |
| 產品目錄頁面： | 616 (CN2011-ZH PDF) |
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16
3547J–MICRO–10/09
AT89LP2052/LP4052
14. Interrupts
The AT89LP2052/LP4052 provides 6 interrupt sources: two external interrupts, two timer inter-
rupts, a serial port interrupt, and an analog comparator interrupt. These interrupts and the
system reset each have a separate program vector at the start of the program memory space.
Each interrupt source can be individually enabled or disabled by setting or clearing a bit in the
interrupt enable register IE. The IE register also contains a global disable bit, EA, which disables
all interrupts.
Each interrupt source can be individually programmed to one of four priority levels by setting or
clearing bits in the interrupt priority registers IP and IPH. An interrupt service routine in progress
can be interrupted by a higher priority interrupt, but not by another interrupt of the same or lower
priority. The highest priority interrupt cannot be interrupted by any other interrupt source. If two
requests of different priority levels are pending at the end of an instruction, the request of higher
priority level is serviced. If requests of the same priority level are pending at the end of an
instruction, an internal polling sequence determines which request is serviced. The polling
sequence is based on the vector address; an interrupt with a lower vector address has higher
priority than an interrupt with a higher vector address. Note that the polling sequence is only
used to resolve pending requests of the same priority level.
The External Interrupts INT0 and INT1 can each be either level-activated or edge-activated,
depending on bits IT0 and IT1 in Register TCON. The flags that actually generate these inter-
rupts are the IE0 and IE1 bits in TCON. When the service routine is vectored to, hardware clears
the flag that generated an external interrupt only if the interrupt was edge-activated. If the inter-
rupt was level activated, then the external requesting source (rather than the on-chip hardware)
controls the request flag.
Table 13-1.
PCON
– Power Control Register
PCON = 87H
Reset Value = 000X 0000B
Not Bit Addressable
SMOD1
SMOD0
PWDEX
POF
GF1
GF0
PD
IDL
Bit
7
6
543
21
0
Symbol
Function
SMOD1
Double Baud Rate bit. Doubles the baud rate of the UART in Modes 1, 2, or 3.
SMOD0
Frame Error Select. When SMOD0 = 1, SCON.7 is SM0. When SMOD0 = 1, SCON.7 is FE. Note that FE will be set after
a frame error regardless of the state of SMOD0.
PWDEX
Power-down Exit Mode. When PWDEX = 1, wake up from Power-down is externally controlled. When PWDEX = 0, wake
up from Power-down is internally timed.
POF
Power Off Flag. POF is set to “1” during power up (i.e. cold reset). It can be set or reset under software control and is not
affected by RST or BOD (i.e. warm resets).
GF1, GF0
General-purpose Flags
PD
Power-down bit. Setting this bit activates power-down operation.
IDL
Idle Mode bit. Setting this bit activates Idle mode operation
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相關代理商/技術參數 |
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| AT89LP4052-20SU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 4K FLASH-20MHZ 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| AT89LP4052-20XU | 功能描述:8位微控制器 -MCU SINGLE CYC 4K FLASH -20MHZ 2.4-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| AT89LP4052W-10SU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 4K ISP FLASH 2.0-3.6V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| AT89LP4052W-10XU | 功能描述:8位微控制器 -MCU SINGLE CYCLE 4K ISP FLASH 2.0-3.6V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| AT89LP428-20AU | 功能描述:8位微控制器 -MCU SingleCycle 8051 4K ISP Flash 2.4V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
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