參數(shù)資料
型號(hào): M38049FFLWG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PBGA64
封裝: 6 X 6 MM, 0.65 MM PITCH, PLASTIC, LGA-64
文件頁數(shù): 105/129頁
文件大?。?/td> 1721K
代理商: M38049FFLWG
Rev.1.00
Oct 27, 2008
Page 77 of 128
REJ03B0266-0100
3804 Group (Spec.L)
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an “L”
level for 16 cycles or more of XIN. Then the RESET pin is
returned to an “H” level (the power source voltage should be
between 2.7 V and 5.5 V, and the oscillation should be stable),
reset is released. After the reset is completed, the program starts
from the address contained in address FFFD16 (high-order byte)
and address FFFC16 (low-order byte).
Input to the RESET pin in the following procedure.
When power source is stabilized
(1) Input “L” level to RESET pin.
(2) Input “L” level for 16 cycles or more to XIN pin.
(3) Input “H” level to RESET pin.
At power-on
(1) Input “L” level to RESET pin.
(2) Increase the power source voltage to 2.7 V.
(3) Wait for td(P-R) until internal power source has stabilized.
(4) Input “L” level for 16 cycles or more to XIN pin.
(5) Input “H” level to RESET pin.
Fig. 74 Reset circuit example
Fig. 75 Reset sequence
VCC
RESET
VCC
RESET
Power source
voltage detection
circuit
Example at VCC = 5 V
0 V
VCC
RESET
0.2VCC or less
0 V
VCC
RESET
td(P-R)+XIN16 cycles or more
5 V
2.7 V
td(P-R)+XIN16 cycles or more
RESET
Internal
reset
Data
φ
Address
SYNC
XIN
?
FFFC
FFFD
ADH,L
?
?ADL
ADH
Notes 1: The frequency relation of f(XIN) and f(
φ) is f(XIN) = 8 f(φ).
2: The question marks (?) indicate an undefined state that depends on the previous state.
Reset address from the
vector table.
XIN : 10.5 to 18.5 clock cycles
相關(guān)PDF資料
PDF描述
M38049FFLHP 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PQFP64
M38049FFLSP 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PDIP64
M38112E4SS 8-BIT, UVPROM, 4.19 MHz, MICROCONTROLLER, CDIP64
M38112E4-XXXFP 8-BIT, OTPROM, 4.19 MHz, MICROCONTROLLER, PQFP64
M38112E4-XXXSP 8-BIT, OTPROM, 4.19 MHz, MICROCONTROLLER, PDIP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M38049RLSS 功能描述:DEV EMULATOR CHIP RAM 2KB 64SDIP RoHS:否 類別:編程器,開發(fā)系統(tǒng) >> 內(nèi)電路編程器、仿真器以及調(diào)試器 系列:- 產(chǎn)品變化通告:Development Systems Discontinuation 19/Jul/2010 標(biāo)準(zhǔn)包裝:1 系列:* 類型:* 適用于相關(guān)產(chǎn)品:* 所含物品:*
M3806 功能描述:電纜固定件和配件 LTSCG 625 BLACK RoHS:否 制造商:Heyco 類型:Cable Grips, Liquid Tight 材料:Nylon 顏色:Black 安裝方法:Cable 最大光束直徑:11.4 mm 抗拉強(qiáng)度:
M3806 BK001 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 1000'
M3806 BK002 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 500'
M3806 BK005 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 100'