參數(shù)資料
型號： MC68HC11F1CPU4
廠商： Freescale Semiconductor
文件頁數(shù)： 16/158頁
文件大?。?/td> 0K
描述： IC MCU 512 EEPROM 4MHZ 80-LQFP
標(biāo)準(zhǔn)包裝： 90
系列： HC11
核心處理器： HC11
芯體尺寸： 8-位
速度： 4MHz
連通性： SCI，SPI
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 30
程序存儲器類型： ROMless
EEPROM 大?。?/td> 512 x 8
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.75 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 80-LQFP
包裝： 托盤
TIMING SYSTEM
MC68HC11F1
9-6
TECHNICAL DATA
9.2.2 Timer Input Capture Registers
When an edge has been detected and synchronized, the 16-bit free-running counter
value is transferred into the input capture register pair as a single 16-bit parallel trans-
fer. Timer counter value captures and timer counter incrementing occur on opposite
half-cycles of the phase 2 clock so that the count value is stable whenever a capture
occurs. The TICx registers are not affected by reset. Input capture values can be read
from a pair of 8-bit read-only registers. A read of the high-order byte of an input capture
register pair inhibits a new capture transfer for one bus cycle. If a double-byte read in-
struction, such as LDD, is used to read the captured value, coherency is assured.
When a new input capture occurs immediately after a high-order byte read, transfer is
delayed for an additional cycle but the value is not lost.
TICx not affected by reset.
9.2.3 Timer Input Capture 4/Output Compare 5 Register
Use TI4/O5 as either an input capture register or an output compare register, depend-
ing on the function chosen for the PA3 pin. To enable it as an input capture pin, set the
I4/O5 bit in the pulse accumulator control register (PACTL) to logic level one. To use
it as an output compare register, set the I4/O5 bit to a logic level zero. Refer to 9.6
Pulse Accumulator.
The TI4/O5 register pair resets to ones ($FFFF).
9.3 Output Compare
Use the output compare (OC) function to program an action to occur at a specific time
— when the 16-bit counter reaches a specified value. For each of the five output com-
pare functions, there is a separate 16-bit compare register and a dedicated 16-bit com-
parator. The value in the compare register is compared to the value of the free-running
counter on every bus cycle. When the compare register matches the counter value, an
output compare status flag is set. The flag can be used to initiate the automatic actions
for that output compare function.
TIC1–TIC3 — Timer Input Capture
$1010–$1015
$1010
Bit 15
14
13
12
11
10
9
Bit 8
TIC1 (High)
$1011
Bit 7
654321
Bit 0
TIC1 (Low)
$1012
Bit 15
14
13
12
11
10
9
Bit 8
TIC2 (High)
$1013
Bit 7
654321
Bit 0
TIC2 (Low)
$1014
Bit 15
14
13
12
11
10
9
Bit 8
TIC3 (High)
$1015
Bit 7
654321
Bit 0
TIC3 (Low)
TI4/O5 — Timer Input Capture 4/Output Compare 5
$101E, $101F
$101E
Bit 15
14
13
12
11
10
9
Bit 8
TI4/O5 (High)
$101F
Bit 7
654321
Bit 0
TI4/O5 (Low)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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