參數(shù)資料
型號: C8051F010-GQ
廠商: Silicon Laboratories Inc
文件頁數(shù): 165/171頁
文件大?。?/td> 0K
描述: IC 8051 MCU 32K FLASH 64TQFP
產(chǎn)品培訓模塊: Serial Communication Overview
標準包裝: 160
系列: C8051F01x
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SMBus(2 線/I²C),SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b; D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 托盤
產(chǎn)品目錄頁面: 621 (CN2011-ZH PDF)
其它名稱: 336-1191
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
13. RESET SOURCES
The reset circuitry of the MCUs allows the controller to be easily placed in a predefined default condition. On entry
to this reset state, the CIP-51 halts program execution, forces the external port pins to a known state and initializes
the SFRs to their defined reset values. Interrupts and timers are disabled. On exit, the program counter (PC) is
reset, and program execution starts at location 0x0000.
All of the SFRs are reset to predefined values. The reset values of the SFR bits are defined in the SFR detailed
descriptions. The contents of internal data memory are not changed during a reset and any previously stored data is
preserved. However, since the stack pointer SFR is reset, the stack is effectively lost even though the data on the
stack are not altered.
The I/O port latches are reset to 0xFF (all logic ones), activating internal weak pull-ups which take the external I/O
pins to a high state. The weak pull-ups are enabled during and after the reset. If the source of reset is from the VDD
Monitor or writing a 1 to PORSF, the /RST pin is driven low until the end of the VDD reset timeout.
On exit from the reset state, the MCU uses the internal oscillator running at 2MHz as the system clock by default.
Refer to Section 14 for information on selecting and configuring the system clock source. The Watchdog Timer is
enabled using its longest timeout interval. (Section 13.8 details the use of the Watchdog Timer.)
There are seven sources for putting the MCU into the reset state: power-on/power-fail, external /RST pin, external
CNVSTR signal, software commanded, Comparator 0, Missing Clock Detector, and Watchdog Timer. Each reset
source is described below:
Figure 13.1. Reset Sources Diagram
WDT
CIP-51
Core
Missing
Clock
Detector
(one-
shot)
WD
T
Strobe
(Software Reset)
/RST
+
-
VDD
Supply
Reset
Timeout
(wired-OR)
System Reset
Supply
Monitor
PRE
Reset
Funnel
+
-
CP0+
Comparator 0
CP0-
(Port
I/O)
Crossbar
CNVSTR
CNVRSEF
C0RSEF
EN
WD
T
Enable
EN
MCD
Enable
SWRSF
System
Clock
93
Rev. 1.7
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