参数资料
型号: EVAL-ADE5169EBZ-2
厂商: Analog Devices Inc
文件页数: 99/156页
文件大小: 0K
描述: BOARD EVALUATION FOR AD5169
标准包装: 1
主要目的: 电源管理,电度表/功率表
嵌入式:
已用 IC / 零件: ADE5169
主要属性: 用于汇编语言和 C 代码的 IAR 工具
次要属性: 隔离和非隔离输出选项
已供物品: 板,软件
Data Sheet
ADE5166/ADE5169/ADE5566/ADE5569
Table 89. Watchdog and Flash Protection Byte in Flash (Flash Address = 0xF7FF)
Bit
7
Mnemonic
WDPROT_PROTKY7
Default
1
Description
This bit holds the protection for the watchdog timer and the seventh bit of the flash protection key.
When this bit is cleared, the watchdog enable and event bits, WDE and WDIR, cannot be changed
by user code. The watchdog configuration is then fixed to WDIR = 0 and WDE = 1. The watchdog
timeout set using the PRE bits (Bits[7:4]) can still be modified by user code.
The value of this bit is also used to set the flash protection key. If this bit is cleared to protect the
watchdog, then the default value for the flash protection key is 0x7F instead of 0xFF (see the
Protecting the Flash Memory section for more information on how to clear this bit).
[6:0]
PROTKY
0xFF
These bits hold the flash protection key. The contents of this flash address are compared to the flash
protection key SFR (PROTKY, Address 0xBB) when the protection is being set or changed. If the two
values match, the new protection is written to the Flash Address 0x3FFF to Flash Address 0x3FFB.
See the Protecting the Flash Memory section for more information on how to configure these bits.
WRITING TO THE WATCHDOG TIMER SFR
(WDCON, ADDRESS 0xC0)
Writing data to the WDCON SFR involves a double instruction
sequence. The WDWR bit (Bit 0) must be set, and the following
instruction must be a write instruction to the WDCON SFR.
; Disable Watchdog
CLR EA
SETB WDWR
CLR WDE
SETB EA
This sequence is necessary to protect the WDCON SFR from
code execution upsets that may unintentionally modify this
SFR. Interrupts should be disabled during this operation due
WATCHDOG TIMER INTERRUPT
If the watchdog timer is not cleared within the watchdog timeout
period, a system reset occurs unless the watchdog timer interrupt is
enabled. The watchdog timer interrupt response bit (WDIR, Bit 3)
is located in the watchdog timer SFR (WDCON, Address 0xC0).
Enabling the WDIR bit allows the program to examine the stack
or other variables that may have led the program to execute
inappropriate code. The watchdog timer interrupt also allows
the watchdog to be used as a long interval timer.
Note that WDIR is automatically configured as a high priority
interrupt. This interrupt cannot be disabled by the EA bit (Bit 7)
in the interrupt enable SFR (IE, Address 0xA8; see Table 81).
Even if all the other interrupts are disabled, the watchdog is
kept active to watch over the program.
to the consecutive instruction cycles.
Rev. D | Page 99 of 156
相关PDF资料
PDF描述
VE-J1M-EX CONVERTER MINIMOD DC/DC 10V 75W
VE-21M-EX CONVERTER MOD DC/DC 10V 75W
VE-21R-EX CONVERTER MOD DC/DC 7.5V 75W
AD9912A/PCBZ BOARD EVALUATION FOR AD9912
H1KXH-2636M IDC CABLE - HPK26H/AE26M/X
相关代理商/技术参数
参数描述
EVAL-ADE5169F62EBZ 制造商:Analog Devices 功能描述:EVALUATION BOARD FOR ADE5169 - Boxed Product (Development Kits) 制造商:Rochester Electronics LLC 功能描述:
EVAL-ADE5569F62EBZ 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
EVAL-ADE7169EBZ-2 功能描述:BOARD EVALUATION FOR ADE7169F16 RoHS:是 类别:编程器,开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口,收发器,PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板
EVAL-ADE7169F16EB 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Energy Measurement IC with 8052 MCU, RTC and LCD driver
EVAL-ADE7169F16EBZ 制造商:Analog Devices 功能描述:Evaluation Board For ADE7169 制造商:Analog Devices 功能描述:EVAL BD FOR ADE7169 - Bulk