參數(shù)資料
型號(hào): MC68HC05L16CFU
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, PQFP80
封裝: PLASTIC, QFP-80
文件頁數(shù): 123/146頁
文件大?。?/td> 852K
代理商: MC68HC05L16CFU
Timer System
MC68HC05L16 MC68HC705L16 Data Sheet, Rev. 4.1
78
Freescale Semiconductor
Figure 9-2. Timer 1 Block Diagram
Because the timer has a 16-bit architecture, each specific functional segment (capability) is represented
by two registers. These registers contain the high byte and low byte of that functional segment. Generally,
accessing the low byte of a specific 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 accessed also.
NOTE
The I bit in the condition code register (CCR) should be set while
manipulating both the high byte and low byte register of a specific timer
function to ensure that an interrupt does not occur.
INPUT
CAPTURE
REGISTER
CLOCK
INTERNAL BUS
OUTPUT
HIGH
BYTE
LOW
BYTE
$16
$17
÷4
INTERNAL
PROCESSOR
16-BIT FREE
RUNNING
COUNTER
ALTERNATE
REGISTER
8-BIT
BUFFER
HIGH
BYTE
LOW
BYTE
$1A
$1B
$18
$19
HIGH
BYTE
LOW
BYTE
$14
$15
OUTPUT
COMPARE
CIRCUIT
OVERFLOW
DETECT
CIRCUIT
EDGE
DETECT
CIRCUIT
TIMER
STATUS
REGULAR
$13
ICIE
IEDG
OLVL
OUTPUT
LEVEL
REGULAR
RESET
TIMER
CONTROL
REGULAR
$12
OUTPUT
LEVEL
(TCMP)
INTERRUPT
CIRCUIT
TOIE
OCIE
EDGE
INPUT
D
CLK
C
Q
(NOT CONNECTED TO A PIN)
COMPARE
REGISTER
(TCAP)
ICF
OCF
TOF
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