- 您現在的位置：買賣IC網 > PDF目錄67966 > MC68HC05F4CDW (FREESCALE SEMICONDUCTOR INC) 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PDSO28 PDF資料下載
參數資料
| 型號： | MC68HC05F4CDW |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數： | 78/130頁 |
| 文件大?。?/td> | 10504K |
| 代理商： | MC68HC05F4CDW |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁當前第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁
MC68HC05F4
6-1
16-BIT PROGRAMMABLE TIMER
6
16-BIT PROGRAMMABLE TIMER
The timer consists of a 16-bit read-only free-running counter, with a xed divide-by-four prescaler,
plus the input capture/output compare circuitry. The timer can be used for many purposes
including measuring pulse length of two input signals and generating two output signals. Pulse
lengths for both input and output signals can vary from several microseconds to many seconds.
The timer is also capable of generating periodic interrupts or indicating passage of an arbitrary
multiple of four CPU cycles. A block diagram is shown in Figure 6-1, and timing diagrams are
The timer has a 16-bit architecture, hence each specic functional segment is represented by two
8-bit registers. These registers contain the high and low byte of that functional segment. Accessing
the low byte of a specic timer function allows full control of that function; however, an access of
the high byte inhibits that specic timer function until the low byte is also accessed.
The 16-bit programmable timer is monitored and controlled by a group of fteen registers, full
details of which are contained in this section.
Note:
A problem may arise if an interrupt occurs in the time between the high and low bytes
being accessed. To prevent this, the I-bit in the condition code register (CCR) should be
set while manipulating both the high and low byte register of a specic timer function,
ensuring that an interrupt does not occur.
6.1
Counter
The key element in the programmable timer is a 16-bit, free-running counter or counter register,
preceded by a prescaler that divides the internal processor clock by four. The prescaler gives the
timer a resolution of 2
s if the internal bus clock is 2 MHz. The counter is incremented during the
low portion of the internal bus clock. Software can read the counter at any time without affecting
its value.
TPG
47
05F4Book Page 1 Tuesday, August 5, 1997 1:10 pm
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC705G4 | 8-BIT, OTPROM, 1 MHz, MICROCONTROLLER, PQFP80 |
| MC68HC05G3 | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80 |
| MC68HC705J5ACJP | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP16 |
| MC68HC705J5ACP | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20 |
| MC68HC05J5AJDW | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO16 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC05F5 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05F6 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MCU with DTMF/melody generator |
| MC68HC05F6P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| MC68HC05F8 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor(HCMOS) microcontroller unit |
| MC68HC05J1 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
發(fā)布緊急采購，3分鐘左右您將得到回復。