參數(shù)資料
型號(hào): MC68HC05SB7
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: MO-150, SSOP-28
文件頁數(shù): 120/170頁
文件大?。?/td> 2161K
代理商: MC68HC05SB7
August 27, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05SB7
SYSTEM CLOCK
MOTOROLA
REV 2.1
8-1
SECTION 8
SYSTEM CLOCK
This section describes the system clock options for the MC68HC05SB7.
8.1
CLOCK SOURCES
The internal operating clock of the MC68HC05SB7 is derived from two possible
clock sources:
External oscillator input via the OSC1 and OSC2 pins - this is enabled
by a mask option on the MC68HC05SB7.
(On the MC68HC705SB7, the OSCS bit in the Mask Option Register
enables/disables external osc input option.)
Internal VCO generated.
Figure 8-1. MC68HC05SB7 Input Clock Source
VCO
VA0
VA1
VA2
VA3
VA4
VCOEN
SCLK
MUX
OSC2
I/O PORT
÷ 2
OSC1
OSC
OSCS
fOP
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