參數(shù)資料
型號(hào): EM78P468NBQ
廠商: ELAN Microelctronics Corp .
元件分類(lèi): 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁(yè)數(shù): 39/82頁(yè)
文件大?。?/td> 1491K
代理商: EM78P468NBQ
EM78P468N
8-BIT Microcontroller
Product Specification
(V1.2) 03.15.2005
(This specification is subject to change without further notice)
35
4.6
lla
4.6
Table 3 Oscillator Modes as defined by FSMD, FMMD1, FMMD0.
FSMD
FMMD1
FMMD0
Osci
tor
.1
Oscillator Modes
This LSI can operate in the three different oscillator modes from main oscillator (R-OSCI,
OSCO), such as RC oscillator with external resistor and Internal capacitor mode (ERIC);
crystal oscillator mode; and PLL operation mode (R-OSCI connected 0.01
μ
F capacitor to
Ground). User can select one of them by programming FMMD1 and FMMD0 in the
CODE options register. The sub-oscillator can be operated in crystal mode and ERIC
mode. Table 3 below shows how these three modes are defined.
Main clock
Sub-clock
0
0
0
1
1
1
0
0
1
0
0
1
0
1
X
0
1
X
RC type (ERIC)
Crystal type
PLL type
RC type (ERIC)
Crystal type
PLL type
RC type (ERIC)
RC type (ERIC)
RC type (ERIC)
Crystal type
al type
Cryst
stal type
Cry
Table 4 Summary of maximum operating speeds
Conditions
VDD
Fxt max.(MHz)
2.3
3.0
5.0
4
8
10
Two clocks
4.6
W
choose RD register to change high oscilla
frequency (Fm) and
req
ine
oscillator. We can
ion b
etween hig
ncy.
able:
h
shown
.2
Phase Lock Loop (PLL Mode)
hen operate on PL mode, the High f
uency determ
tor freque
as below t
d by sub-
The relat
sub-oscillator is
Xout
Xin
XTAL
uF
1
R-OSCI
EM78P468N
0.01
C
C2
Circuit for PLL mode
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