- 您現在的位置：買賣IC網 > PDF目錄369230 > 68HC05PL4 (Motorola, Inc.) 8-Bit Microcontroller Units (MCU).(8位微控制器) PDF資料下載
參數資料
| 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： | 55/98頁 |
| 文件大小： | 1019K |
| 代理商： | 68HC05PL4 |
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頁當前第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
April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
16-BIT PROGRAMMABLE TIMER
MOTOROLA
9-5
NOTE
To prevent interrupts from occurring between readings of the ACRH and ACRL,
set the I bit in the condition code register (CCR) before reading ACRH and clear
the I bit after reading ACRL.
9.3
INPUT CAPTURE REGISTERS
The input capture function is a technique whereby an external signal (connected
to PA2/TCAP pin) is used to trigger the 16-bit timer counter. In this way it is possi-
ble to relate the timing of an external signal to the internal counter value, and
hence to elapsed time.
When the input capture circuitry detects an active edge on the selected source, it
latches the contents of the free-running timer counter registers into the input cap-
ture registers as shown in
Figure 9-6
.
Latching values into the input capture registers at successive edges of the same
polarity measures the period of the selected input signal. Latching the counter val-
ues at successive edges of opposite polarity measures the pulse width of the sig-
nal.
Figure 9-6. Timer Input Capture Block Diagram
The input capture registers are made up of two 8-bit read-only registers (ICRH,
ICRL) as shown in
Figure 9-7
. The input capture edge detector contains a Schmitt
trigger to improve noise immunity. The edge that triggers the counter transfer is
defined by the input edge bit (IEDG) in the TCR. Reset does not affect the con-
tents of the input capture registers.
I
ICRH ($0014)
16-BIT COUNTER
÷
4
INTERNAL
CLOCK
(XTAL
÷
2)
TIMER
INTERRUPT
TIMER CONTROL REG.
$0012
REQUEST
INPUT CAPTURE (ICF)
RESET
ICRL ($0015)
I
TIMER STATUS REG.
$0013
INTERNAL
DATA
BUS
(
READ
ICRH
READ
ICRL
LATCH
I
EDGE
SELECT
& DETECT
LOGIC
I
TCAP
INTERNAL
DATA
BUS
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
發布緊急采購，3分鐘左右您將得到回復。