参数资料
型号: AT89LP4052-16XU
厂商: Atmel
文件页数: 63/94页
文件大小: 0K
描述: IC 8051 MCU FLASH 4K 20TSSOP
标准包装: 74
系列: 89LP
核心处理器: 8051
芯体尺寸: 8-位
速度: 16MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 15
程序存储器容量: 4KB(4K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
包装: 管件
66
3547J–MICRO–10/09
AT89LP2052/LP4052
23.4.8
Write User Signature Page
Function:
Programs 1 to 32 bytes of data into the User Signature Row.
The User Row Programming Fuse must be enabled before writing to the User Signature Row.
The byte address (offset in page) is initialized to bits [4:0] of the low address byte. One byte
of data is loaded from P1 for the current address by the positive edge of a XTAL1 pulse. The
internal address is incremented by one on the negative edge of the XTAL1 pulse. The
address will wrap around to the 1st byte of the page when incremented past 31, however
previously loaded bytes should not be re-loaded.
Usage:
1.
Bring CS (P3.2) low.
2.
Drive P1 to AAh and pulse XTAL1 high.
3.
Drive P1 to 52h and pulse XTAL1 high.
4.
Drive P1 to 00h and pulse XTAL1 high.
5.
Drive P1 with bits [4:0] of address and pulse XTAL1 high.
6.
To write only previously loaded data, bring CS high before loading additional bytes. To
load data bytes, drive data on P1 and pulse XTAL1 high to load one byte and increment
to the next address. Repeat for additional bytes. Only 1-32 bytes may be programmed
at one time, including any bytes loaded by a previous load page buffer command. Bytes
should not be loaded more than once.
7.
Bring CS high.
8.
Wait 2 ms, monitor P3.1, or poll data/status.
Note:
It is not possible to skip bytes while loading data during write. To load non-contiguous bytes in a
page, use the Load Page Buffer command.
Figure 23-12. Write User Signature Page Sequence
Note:
The waveform on this page is not to scale.
AAh
52h
00h
000bbbbb
DIN 0
CS
XTAL1
P1
DIN 1
DIN n
RDY/BSY
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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 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
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