参数资料
型号: W78E858A40FL
厂商: Nuvoton Technology Corporation of America
文件页数: 10/35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
- 18 -
Revision A8
5.13.1 CHPCON (BFH)
BIT
NAME
FUNCTION
7
SWRESET
(F04KMODE)
When this bit is set to 1, and both FBOOTSL and FPROGEN are set to 1. It
will enforce microcontroller reset to initial condition just like power on reset.
This action will re-boot the microcontroller and start to normal operation.
To read this bit can determine that the F04KBOOT mode is running.
6
-
Reserve.
5
ENEEPROM Enable on-chip 128 bytes EEPROM.
4
ENAUXRAM Enable on-chip 512 bytes auxiliary RAM.
3
2
-
1
FBOOTSL
The loader program location selection.
= 0: loader program in 32K memory bank.
= 1: loader program in 4K memory bank.
0
FPROGEN
In system programming enable flag.
= 1: enable. The CPU switches to the programming flash mode after
entering the idle mode and waken up from interrupt. The CPU will
execute the loader program while in on-chip programming mode.
= 0: disable. The on-chip FLASH EPROM read-only. In-system
programmability is inhibit.
5.14 MXPSR (A2H)
BIT
NAME
FUNCTION
7
BUSY
EEPROM BUSY signal.
1: EEPROM is writing.
6-2
-
Reserved.
1-0
ADDRPNT
Address pointer by MOVX instruction
0: read or write lower 256 byte Auxiliary RAM by pointer of R0 or R1 register
1: read or write Higher 256 byte Auxiliary RAM by pointer of R0 or R1
register
2: 128 byte EEPROM by pointer of R0 or R1 register
5.15 Interrupt System
External events and the real-time-driven on-chip peripherals require service by the CPU asynchronous
to do execution of any particular section of code. To tie the asynchronous actives of these functions to
normal program execution, a multiple-source, two-priority-level, nested interrupt system is provided.
The W78E858 acknowledges interrupt requests from fourteen sources as below:
INT0 and INT1
Timer0 and Timer1
UART serial I/O
INT2 to INT9 (at Port1)
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