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鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� MC908LD64IFUE
寤犲晢锛� Freescale Semiconductor
鏂囦欢闋佹暩(sh霉)锛� 360/362闋�
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC MCU 8BIT FOR LCD 64-QFP
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 420
绯诲垪锛� HC08
鏍稿績铏曠悊鍣細 HC08
鑺珨灏哄锛� 8-浣�
閫熷害锛� 6MHz
閫i€氭€э細 I²C锛孶SB
澶栧湇瑷�(sh猫)鍌欙細 OSD锛孭OR锛孭WM
杓稿叆/杓稿嚭鏁�(sh霉)锛� 39
绋嬪簭瀛樺劜(ch菙)鍣ㄥ閲忥細 60KB锛�60K x 8锛�
绋嬪簭瀛樺劜(ch菙)鍣ㄩ鍨嬶細 闁冨瓨
RAM 瀹归噺锛� 2K x 8
闆诲 - 闆绘簮 (Vcc/Vdd)锛� 3 V ~ 3.6 V
鏁�(sh霉)鎿�(j霉)杞�(zhu菐n)鎻涘櫒锛� A/D 6x8b
鎸暕鍣ㄥ瀷锛� 鍏�(n猫i)閮�
宸ヤ綔婧害锛� 0°C ~ 85°C
灏佽/澶栨锛� 64-QFP
鍖呰锛� 鎵樼洡
鐢�(ch菐n)鍝佺洰閷勯爜闈細 725 (CN2011-ZH PDF)
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Oscillator (OSC)
I/O Signals
MC68HC908LD64 鈥� Rev. 3.0
Data Sheet
Freescale Semiconductor
Oscillator (OSC)
97
7.4 I/O Signals
The following paragraphs describe the oscillator I/O signals.
7.4.1 Crystal Amplifier Input Pin (OSC1)
The OSC1 pin is an input to the crystal oscillator amplifier.
An externally generated clock also can feed the OSC1 pin of the crystal
oscillator circuit. Connect the external clock to the OSC1 pin and let the
OSC2 pin float.
7.4.2 Crystal Amplifier Output Pin (OSC2)
The OSC2 pin is the output of the crystal oscillator inverting amplifier.
7.4.3 Oscillator Enable Signal (SIMOSCEN)
The SIMOSCEN signal comes from the SIM and enables the oscillator.
7.4.4 External Clock Source (OSCXCLK)
OSCXCLK is the crystal oscillator output signal. It runs at the full speed
of the crystal (f
XCLK) and comes directly from the crystal oscillator circuit.
Figure 7-1 shows only the logical relation of OSCXCLK to OSC1 and
OSC2 and may not represent the actual circuitry. The duty cycle of
OSCXCLK is unknown and may depend on the crystal and other
external factors. Also, the frequency and amplitude of OSCXCLK can be
unstable at start-up.
7.4.5 Oscillator Out (OSCOUT)
The clock driven to the SIM is the crystal frequency divided by two. This
signal is driven to the SIM for generation of the bus clocks used by the
CPU and other modules on the MCU. OSCOUT will be divided again in
the SIM and results in the internal bus frequency being one fourth of the
OSCXCLK frequency.
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