參數(shù)資料
型號: 68HC05PL4
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數(shù): 50/98頁
文件大小: 1019K
代理商: 68HC05PL4
GENERAL RELEASE SPECIFICATION
April 30, 1998
MOTOROLA
8-2
SYSTEM CLOCKS
MC68HC05PL4
REV 2.0
FMODE — Fast Mode RC select
FMODE selects the oscillating frequency of the internal RC. After power-on-
reset, the default setting is 500kHz.
1 =
Internal RC oscillates at 500kHz
0 =
Internal RC oscillates at 20kHz
OSCF — OSC running Flag
This bit is set when the external clock (External/crystal) from OSC1 is on.
See also CKOSC bit below.
RCF — RC Running Flag
This bit is set when the internal RC clock is on.
CKOSC — ChecK OSC
The CKOSC bit enables the internal logic for external clock selection. The pro-
cedure below should be followed when switching from RC to external clock.
1.
Set the CKSEL1 and CKSEL2 bits for external clock source.
2.
If crystal option is used — set the 8-bit timer for counting crystal
stabilization delay (typically 4064 clock cycles).
3.
Write a “1” to the CKOSC bit and check for OSCF bit set.
4.
If the OSCF bit is not set, no external clock is available, the internal RC
clock will be used as the system clock, irrespective of the setting for
CKSEL1 and CKSEL2.
相關(guān)PDF資料
PDF描述
68HC05PL4B 8-Bit Microcontroller Units (MCU).(8位微控制器)
68HC705PL4 8-Bit Microcontroller Units (MCU).(8位微控制器)
68HC705PL4B 8-Bit Microcontroller Units (MCU).(8位微控制器)
68HC908JB8FS Freescale Semiconductor, Inc.
69190-405 50/100M SOT-23 CMOS RF LDO REGULATORS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
68HC05PL4B 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Industry standard 8-bit M68HC05 CPU core
68HC05SB7 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION (General Release)
68HC05V12 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
68HC05X1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION (General Release)
68HC070KH12 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8 BIT MICROCONTROLLER UNITS