參數(shù)資料
型號(hào): M34283G2-XXXGP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20
封裝: 4.40 X 6.50 MM, 0.65 MM PITCH, PLASTIC, LSSOP-20
文件頁數(shù): 17/41頁
文件大小: 441K
代理商: M34283G2-XXXGP
Rev.1.01
Mar 20, 2006
page 22 of 62
REJ03B0109-0101
4283 Group
Fig. 27 Clock control circuit structure
System clock signal f(XIN) is obtained by externally connecting a
ceramic resonator. Connect this external circuit to pins XIN and
XOUT at the shortest distance as shown Figure 28.
A feedback resistor is built-in between XIN pin and XOUT pin.
Fig. 28 Ceramic resonator external circuit
CLOCK CONTROL
The clock control circuit consists of the following circuits.
System clock generating circuit
Control circuit to stop the clock oscillation
Control circuit to return from the RAM back-up state
OSC
R
S
Q
POF instruction
XIN
XOUT
Ports E0,E1,G0–G3
Pull-down control
register PU0
Port E2
Internal clock
generation circuit
(divided by 4)
Frequency
divider
(divided by 8)
CCK instruction
STCK
INSTCK
Internal power-on reset circuit
Ports D4–D7
Pull-down control
register 1
Multi-
plexer
4283
XIN
XOUT
CIN
COUT
4
5
Use the resonator manufacturer’s
recommended value bacause
constants such as capacitance
depend on the resonator.
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