參數(shù)資料
型號: MC68HC05P18ACP
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, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 99/130頁
文件大小: 1310K
代理商: MC68HC05P18ACP
NON-DISCLOSURE
AGREEMENT
REQUIRED
16-Bit Timer
Technical Data
MC68HC05P18A
16-Bit Timer
8.5 Input Capture
Two 8-bit read-only registers (ICRH and ICRL) make up the 16-bit input
capture. They are used to latch the value of the free-running counter
after a defined transition is sensed by the input capture edge detector.
NOTE:
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 TCR. Reset does not affect the contents of the input
capture registers. See Figure 8-8.
The result obtained by an input capture will be one more than the value
of the free-running counter on the rising edge of the PH2 clock preceding
the external transition (see Figure 8-9). This delay is required for internal
synchronization. Resolution is affected by the prescaler, allowing the
free-running counter to increment once every four PH2 clock cycles.
The contents of the free-running counter are transferred to the input
capture registers on each proper signal transition regardless of the state
of the input capture flag bit (ICF) in register TSR. The input capture
registers always contain the free-running counter value which
corresponds to the most recent input capture.
Address:
$0014
Bit 7
654321
Bit 0
Read:
ICRH7
ICRH6
ICRH5
ICRH4
ICRH3
ICRH2
ICRH1
ICRH0
Write:
Reset:
Unaffected by reset
Address:
$0015
Bit 7
654321
Bit 0
Read:
ICRL7
ICRL6
ICRL5
ICRL4
ICRL3
ICRL2
ICRL1
ICRL0
Write:
Reset:
Unaffected by reset
Figure 8-8. Input Capture Registers (ICRH/ICRL)
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
MC68HC05P18AMP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05P18ADWE 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05P18ADWR3 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05P18ACDWR3 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05P18AMDWR2 8-BIT, MROM, MICROCONTROLLER, PDSO28
相關代理商/技術參數(shù)
參數(shù)描述
MC68HC05P18ADW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P18AMDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P18AMP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P18AP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P1A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification