參數(shù)資料
型號： AT89LS52-16AI
廠商： Atmel
文件頁數(shù)： 14/39頁
文件大小： 0K
描述： IC 8051 MCU FLASH 8K 44TQFP
標(biāo)準包裝： 160
系列： 89LS
核心處理器： 8051
芯體尺寸： 8-位
速度： 16MHz
連通性： UART/USART
外圍設(shè)備： WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 8KB（8K x 8）
程序存儲器類型： 閃存
RAM 容量： 256 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 4 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-TQFP
包裝： 托盤
21
2601C–MICRO–06/08
AT89LS52
17. Program Memory Lock Bits
The AT89LS52 has three lock bits that can be left unprogrammed (U) or can be programmed (P)
to obtain the additional features listed in Table 17-1.
When lock bit 1 is programmed, the logic level at the EA pin is sampled and latched during reset.
If the device is powered up without a reset, the latch initializes to a random value and holds that
value until reset is activated. The latched value of EA must agree with the current logic level at
that pin in order for the device to function properly.
18. Programming the Flash – Parallel Mode
The AT89LS52 is shipped with the on-chip Flash memory array ready to be programmed. The
programming interface needs a high-voltage (12-volt) program enable signal and is compatible
with conventional third-party Flash or EPROM programmers.
The AT89LS52 code memory array is programmed byte-by-byte.
Programming Algorithm: Before programming the AT89LS52, the address, data, and control
signals should be set up according to the Flash programming mode table (Table 20-1) and Fig-
ure 20-1 and Figure 20-2. To program the AT89LS52, take the following steps:
1.
Input the desired memory location on the address lines.
2.
Input the appropriate data byte on the data lines.
3.
Activate the correct combination of control signals.
4.
Raise EA/V
PP to 12V.
5.
Pulse ALE/PROG once to program a byte in the Flash array or the lock bits. The byte-
write cycle is self-timed and typically takes no more than 50 s. Repeat steps 1
through 5, changing the address and data for the entire array or until the end of the
object file is reached.
Table 16-1.
Status of External Pins During Idle and Power-down Modes
Mode
Program Memory
ALE
PSEN
PORT0
PORT1
PORT2
PORT3
Idle
Internal
1
Data
Idle
External
1
Float
Data
Address
Data
Power-down
Internal
0
Data
Power-down
External
0
Float
Data
Table 17-1.
Lock Bit Protection Modes
Program Lock Bits
LB1
LB2
LB3
Protection Type
1
U
No program lock features
2P
U
MOVC instructions executed from external program memory are
disabled from fetching code bytes from internal memory, EA is
sampled and latched on reset, and further programming of the
Flash memory is disabled
3
P
U
Same as mode 2, but verify is also disabled
4
P
Same as mode 3, but external execution is also disabled
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT89LS52-16AU 功能描述:8位微控制器 -MCU LO-VLTG 8K ISP FLASH -16MHZ 2.7-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LS52-16AUR 功能描述:8051 89LS Microcontroller IC 8-Bit 16MHz 8KB (8K x 8) FLASH 44-TQFP (10x10) 制造商:atmel 系列:89LS 包裝:托盤 零件狀態(tài):有效 核心處理器:8051 核心尺寸:8-位 速度:16MHz 連接性:UART/USART 外設(shè):WDT I/O 數(shù):32 程序存儲容量:8KB（8K x 8） 程序存儲器類型:閃存 EEPROM 容量:- RAM 容量:256 x 8 電壓 - 電源（Vcc/Vdd）:2.7 V ~ 4 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器類型:內(nèi)部 工作溫度:-40°C ~ 85°C（TA） 封裝/外殼:44-TQFP 供應(yīng)商器件封裝:44-TQFP（10x10） 標(biāo)準包裝:160
AT89LS52-16JC 功能描述:8位微控制器 -MCU LOW VOLTAGE 8K ISP FLASH - 16MHZ RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LS52-16JI 功能描述:8位微控制器 -MCU LOW VOLTAGE 8K ISP FLASH - 16MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
AT89LS52-16JU 功能描述:8位微控制器 -MCU 8kB Flash 256B RAM 33MHz 2.7V-4.0V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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(fēng)格:SMD/SMT
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