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): 107/148頁
文件大?。?/td> 1732K
代理商: 4559
Rev.1.04
Aug 23, 2007
Page 61 of 146
REJ03B0188-0104
4559 Group
CLOCK CONTROL
The clock control circuit consists of the following circuits.
On-chip oscillator (internal oscillator)
Ceramic resonator
RC oscillation circuit
Quartz-crystal oscillation circuit
Multi-plexer (clock selection circuit)
Frequency divider
Internal clock generating circuit
The system clock and the instruction clock are generated as the
source clock for operation by these circuits.
Figure 59 shows the structure of the clock control circuit.
The 4559 Group operates by the on-chip oscillator clock
(f(RING)) which is the internal oscillator after system is released
from reset.
Also, the ceramic resonator or the RC oscillation can be used for
the main clock (f(XIN)) of the 4559 Group.
The quartz-crystal oscillator can be used for sub-clock (f(XCIN)).
Fig 59. Clock control circuit structure
MR3, MR2
00
01
10
11
Q S
R
Q
R
Timer 3 underflow signal
EPOF instruction +
XCOUT
XCIN
R
EPOF instruction +
10
MR1,MR0
11
System clock (STCK)
Instruction clock
(INSTCK)
Multi-
plexer
Quartz-crystal
oscillation
On-chip oscillator
(internal oscillator)
XOUT
XIN
Ceramic
resonance
RC oscillation
Internal clock
generating circuit
(divided by 3)
RG1
01
RG0
RG2
Divided by 2
Divided by 4
Divided by 8
Division circuit
S
QS
CRCK instruction
Internal reset signal
Key-on wakeup signal
POF instruction
POF2 instruction
相關(guān)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(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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