- 您現在的位置：買賣IC網 > PDF目錄369230 > 68HC705PL4B (Motorola, Inc.) 8-Bit Microcontroller Units (MCU).(8位微控制器) PDF資料下載
參數資料
| 型號： | 68HC705PL4B |
| 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： | 52/98頁 |
| 文件大小： | 1019K |
| 代理商： | 68HC705PL4B |
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頁當前第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
GENERAL RELEASE SPECIFICATION
April 30, 1998
MOTOROLA
9-2
16-BIT PROGRAMMABLE TIMER
MC68HC05PL4
REV 2.0
The basis of the capture/compare Timer is a 16-bit free-running counter which
increases in count with each internal bus clock cycle. The counter is the timing ref-
erence for the input capture and output compare functions. The input capture and
output compare functions provide a means to latch the times at which external
events occur, to measure input waveforms, and to generate output waveforms and
timing delays. Software can read the value in the 16-bit free-running counter at
any time without affect the counter sequence.
Because of the 16-bit timer architecture, the I/O registers for the input capture and
output compare functions are pairs of 8-bit registers. Each register pair contains
the high and low byte of that function. Generally, accessing the low byte of a spe-
cific timer function allows full control of that function; however, an access of the
high byte inhibits that specific timer function until the low byte is also accessed.
Because the counter is 16 bits long and preceded by a fixed divide-by-four pres-
caler, the counter rolls over every 262,144 internal clock cycles. Timer resolution
with a 4 MHz crystal oscillator is 2 microsecond/count.
The interrupt capability, the input capture edge, and the output compare state are
controlled by the timer control register (TCR) located at $0012 and the status of
the interrupt flags can be read from the timer status register (TSR) located at
$0013.
9.1
TIMER REGISTERS (TMRH, TMRL)
The functional block diagram of the 16-bit free-running timer counter and timer
registers is shown in
Figure 9-2
. The timer registers include a transparent buffer
latch on the LSB of the 16-bit timer counter.
Figure 9-2. Timer Counter and Register Block Diagram
T
TMRH ($0018)
TMR LSB
16-BIT COUNTER
÷
4
INTERNAL
CLOCK
(XTAL
÷
2)
TIMER CONTROL REG.
$0012
TIMER
INTERRUPT
REQUEST
OVERFLOW (TOF)
RESET
TMRL ($0019)
T
TIMER STATUS REG.
$0013
INTERNAL
DATA
BUS
($FFFC)
READ
TMRH
READ
TMRL
READ
LATCH
相關PDF資料 |
PDF描述 |
|---|---|
| 68HC908JB8FS | Freescale Semiconductor, Inc. |
| 69190-405 | 50/100M SOT-23 CMOS RF LDO REGULATORS |
| 6A20G | CURRENT 6.0 Amperes VOLTAGE 50 to 1000 Volts |
| 6A40G | CURRENT 6.0 Amperes VOLTAGE 50 to 1000 Volts |
| 6A2 | 6.0 AMP.SILICON RECTIFIERS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 68HC705RC17 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Genneral Release Specification |
| 68HC705SB7 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION (General Release) |
| 68HC705SJ7 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| 68HC705SP7 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| 68HC705SR3 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units |
發布緊急采購，3分鐘左右您將得到回復。