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參數資料
| 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： | 108/148頁 |
| 文件大?。?/td> | 1732K |
| 代理商： | 4559 |
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Rev.1.04
Aug 23, 2007
Page 62 of 146
REJ03B0188-0104
4559 Group
(1) On-chip oscillator operation
After system is released from reset, the MCU starts operation by
the clock output from the on-chip oscillator which is the internal
oscillator.
The clock frequency of the on-chip oscillator depends on the
supply voltage and the operation temperature range.
Be careful that variable frequencies when designing application
products.
(2) Main clock generating circuit (f(XIN))
When the MCU operates by the ceramic resonator or the RC
oscillator as the main clock (f(XIN)).
After system is released from reset, the ceramic oscillation is
valid for main clock.
The ceramic oscillation is invalid and the RC oscillation circuit is
valid with the CRCK instruction.
The CRCK instruction can be executed only once.
Execute the CRCK instruction in the initial setting routine
(executing it in address 0 in page 0 is recommended).
When the main clock (f(XIN)) is not used, connect XIN pin to VSS
and leave XOUT pin open, and do not execute the CRCK
instruction (Figure 61).
(3) Ceramic resonator
When the ceramic resonator is used as the main clock (f(XIN)),
connect the ceramic resonator and the external circuit to pins XIN
and XOUT at the shortest distance.
A feedback resistor is built in between pins XIN and XOUT
(Figure 62). Do not execute the CRCK instruction in program.
(4) RC oscillation
When the RC oscillation is used as the main clock (f(XIN)),
connect the XIN pin to the external circuit of resistor R and the
capacitor C at the shortest distance and leave XOUT pin open.
Then, execute the CRCK instruction (Figure 63).
To select RC oscillation as the system clock, select the main
clock (f(XIN) as the system clock by bits 0 and 1 of the clock
control register MR.
The frequency is affected by a capacitor, a resistor and a
microcomputer. So, set the constants within the range of the
frequency limits.
Fig 60. Switch to ceramic resonance/RC oscillation
Fig 61. Handling of XIN and XOUT when operating on-
chip oscillator
Fig 62. Ceramic resonator external circuit
Fig 63. External RC oscillation circuit
Reset
CRCK
Ceramic resonator circuit valid
RC oscillation circuit invalid
Main clock (f(XIN))
Ceramic resonator circuit invalid
RC oscillation circuit valid
*
Do not use the CRCK instruction in program.
4559
XIN
XOUT
4559
XIN
XOUT
Rd
CIN
COUT
Do not execute the CRCK instruction in program.
*
Note: Externally connect a damping resistor Rd
depending on the oscillation frequency.
(A feedback resistor is built-in.)
Use the resonator manufacturer’s recommended
value because constants such as capacitance
depend on the resonator.
4559
XIN
XOUT
R
C
*
Execute the CRCK
instruction in program.
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
參數描述 |
|---|---|
| 4559_08 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Standard Characteristics |
| 45-590 | 制造商:GC Electronics 功能描述:Conn D-Subminiature Adapter F/F 9/15 POS ST 1 Port |
| 45-590 4/PK | 功能描述:電纜組件 DB-9F DB-15F HI DEN RoHS:否 制造商:Molex 產品:Power Assemblies 類型:Cable Assembly 連接器端口 A:No Connector 連接器端口 A 管腳計數:4 連接器端口 B:No Connector 連接器端口 B 管腳計數: 型式:Male 線規(guī) - 美國線規(guī)（AWG）:20, 28 長度:0.305 m 顏色:Black, Red |
| 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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