參數(shù)資料
型號： 4559
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述： 單芯片4位微機的CMOS
文件頁數(shù)： 98/148頁
文件大?。?/td> 1732K
代理商： 4559
Rev.1.04
Aug 23, 2007
Page 53 of 146
REJ03B0188-0104
4559 Group
VOLTAGE DROP DETECTION CIRCUIT (WITH SKIP
JUDGMENT)
The built-in voltage drop detection circuit is used to set the
voltage drop detection circuit flag (VDF) or to perform system
reset.
Fig 53. Voltage drop detection reset circuit
(1) Operating state of voltage drop detection circuit
The voltage drop detection circuit becomes valid by inputting
“H” to the VDCE pin and it becomes invalid by inputting “L.”
When not executing the SVDE instruction under “H” level of the
VDCE pin, the voltage drop detection circuit become invalid in
power down state (RAM back-up, clock operating mode). As for
this, the voltage drop detection circuit becomes valid at returning
from power down, again.
When executing the SVDE instruction under “H” level of the
VDCE pin, the voltage drop detection circuit becomes valid in
power down state (RAM back-up, clock operating mode).
The state of executing SVDE instruction can be cleared by
system reset.
Note. “O” indicates valid, “×” indicates invalid.
(Note 1)
VDCE
(Note 2)
VRST-/VRST+
+
Voltage drop
detection circuit
VSKIP
+
Flag occurrence
Reset occurrence
VDF
VDD
Voltage drop
detection circuit
reset signal
S
R
Q
S
R
Q
SVDE instruction
Internal reset signal
EPOF instruction + POF instruction
EPOF instruction + POF2 instruction
Key-on wakeup signal
Internal reset signal
Voltage drop
detection circuit flag
Skip judgement
(SNZVD
instruction)
Notes 1:
This symbol represents a parasitic diode.
2: Applied potential to RESET pin must be VDD or less.
Timer 3 underflow signal
Table 22 Operating state of voltage drop detection circuit
VDCE pin
SVDE instruction
at CPU operating
at power down
“L”
No execute
×
Execute
×
“H”
No execute
O
×
Execute
O
相關PDF資料
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456700000 Terminal Block; Leaded Process Compatible:Yes
457000000 Cross Connector; Number of Positions:10; Current Rating:24 VA
45714-0003 Edge Connector,PCB Mnt,RECEPT,8 Contacts,0.507 Pitch,COMPLIANT FIT Terminal,GUIDE SLOT
45714-0001 Card Edge Connector; No. of Contacts:4; Pitch Spacing:0.508"; Contact Termination:Press-Fit; Body Material:LCP Liquid Crystal Polymer, Glass-filled; Mounting Type:Through Hole; Series:45714; Color:Black; Voltage Rating:250V RoHS Compliant: Yes
45714-0002 Card Edge Connector; No. of Contacts:6; Pitch Spacing:0.508"; Contact Termination:Press-Fit; Body Material:LCP Liquid Crystal Polymer, Glass-filled; Mounting Type:Through Hole; Series:45714; Color:Black; Voltage Rating:250V RoHS Compliant: Yes
相關代理商/技術參數(shù)
參數(shù)描述
4559_08 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Standard Characteristics
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4-5-5906 功能描述:TAPE 5906 VHB FOAM 4" X 5YD 制造商:3m (tc) 系列:* 零件狀態(tài):有效 標準包裝:1
4-5-5907 功能描述:TAPE 5907 VHB FOAM 4" X 5YD 制造商:3m (tc) 系列:* 零件狀態(tài):有效 標準包裝:1
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