参数资料
型号: W78E858A40FL
厂商: Nuvoton Technology Corporation of America
文件页数: 2/35页
文件大小: 0K
描述: IC MCU 8-BIT 32K FLASH 44-PQFP
标准包装: 96
系列: W78
核心处理器: 8052
芯体尺寸: 8-位
速度: 40MHz
连通性: EBI/EMI,串行端口
外围设备: POR,PWM,WDT
输入/输出数: 36
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 768 x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 44-BQFP
包装: 托盘
W78E858
Publication Release Date: April 22, 2008
- 10 -
Revision A8
jb
acc.7,$wait0
ret
;----------------------------------------------------------------
write_eeprom_block:
;input r0:counter
;input r1:pattern form
;input dptr:eeprom base address
$write_loop:
mov
a,r1
movx
@dptr,a
inc
dpl
djnz
r0,$write_loop
call
busy_waiting
ret
;----------------------------------------------------------------
read_eeprom_block:
;input r0:counter
;input r1:pattern form
;input dptr:eeprom base address
;output setb c --> fail
push
b
$read_loop:
movx
a,@dptr
mov
b,a
mov
a,r1
cjne
a,b,$error
inc
dpl
djnz
r0,$read_loop
clr
c
jmp
$end
$error:
setb
c
$end:
pop
b
ret
.end
5.4 On-chip Flash EPROM
The W78E858 includes two banks of FLASH EPROM. One is 32K bytes of main FLASH EPROM for
application program (APROM) and another 4K bytes of FLASH EPROM for loader program (LDROM)
when operating the in-system programming feature. In normal operation, the micro-controller will
execute the code from the 32K bytes of APROM. By setting program registers, user can force CPU to
switch to the programming mode which will execute the code (loader program) from the 4K bytes of
auxiliary LDROM, and this loader program is going to update the contents of the 32K bytes of
APROM. After chip reset, the micro-controller executes the new application program in the APROM.
This in-system programming feature makes the job easy and efficient in which the application needs to
update firmware frequently. In some applications, the in-system programming feature make it possible
that
end-user is able to easily update the system firmware by themselves without opening the
chassis.
相关PDF资料
PDF描述
W83303AG IC ACPI CONTROLLER 48-LQFP
W83627UHG IC I/O CONTROLLER 128-QFP
W83L951DG IC EMBEDDED CNTRLR 128-LQFP
X90100M8IZT1 IC DIGITAL CAPACITOR NV 8-MSOP
X9015WS8T1 IC XDCP SGL 32-TAP 10K 8-SOIC
相关代理商/技术参数
参数描述
W78E858A40PL 功能描述:IC MCU 8-BIT 32K FLASH 44-PLCC RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:W78 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI,I²C,UART/USART 外围设备:POR,PWM,WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC(J 形引线) 包装:带卷 (TR)
W78ERD2 制造商:WINBOND 制造商全称:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2_07 制造商:WINBOND 制造商全称:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2A 制造商:WINBOND 制造商全称:Winbond 功能描述:8-BIT MICROCONTROLLER
W78ERD2A40DL 功能描述:IC MCU 8-BIT 64K FLASH 40-DIP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:W78 标准包装:300 系列:78K0R/Ix3 核心处理器:78K/0R 芯体尺寸:16-位 速度:40MHz 连通性:3 线 SIO,I²C,LIN,UART/USART 外围设备:DMA,LVD,POR,PWM,WDT 输入/输出数:27 程序存储器容量:16KB(16K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:1K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:38-SSOP 包装:托盘