参数资料
型号: AT89LP4052-16PI
厂商: Atmel
文件页数: 61/94页
文件大小: 0K
描述: IC 8051 MCU FLASH 4K 20DIP
标准包装: 18
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-DIP(0.300",7.62mm)
包装: 管件
其它名称: AT89LP4052-20PI
AT89LP4052-20PI-ND
64
3547J–MICRO–10/09
AT89LP2052/LP4052
23.4.6
Write Code Page
Function:
Programs 1 page (1 to 32 bytes) of data into the Code Memory array.
Page address determined by bits [11:5] of loaded address.
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 50h and pulse XTAL1 high.
4.
Drive P1 with bits [15:8] of address and pulse XTAL1 high.
5.
Drive P1 with bits [7:0] 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 23-10. Write Code Page Sequence
Note:
The waveform on this page is not to scale.
AAh
50h
0000aaaa
aaabbbbb
DIN 0
CS
XTAL1
P1
DIN 1
DIN n
RDY/BSY
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