參數(shù)資料
型號: MC68HC2681P
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 76/88頁
文件大?。?/td> 726K
代理商: MC68HC2681P
MC68HC2681
MOTOROLA
MC68HC681 USER’S MANUAL
A-9
A
A.4.12.4 PORT TIMING
.
Figure A-5. Port Timing
A.4.12.5 INTERRUPT RESET TIMING
.
Figure A-6. Interrupt Reset Timing
CHARACTERISTIC
SYMBOL
MIN
MAX
UNIT
Port Input Setup Time to R Asserted
tPS
10
ns
Port Input Hold Time from R Negated
tPH
0—
ns
Port Output Valid from W Negated
tPD
400
ns
CHARACTERISTIC
SYMBOL
MIN
MAX
UNIT
IRQ Negated or OP3-OP7 High (When Used as Interrupts) From R or W Negated:
Reset Receiver Command (RxRDY/FFULL interrupt)
Read RB (RxRDY/FFULL interrupt)
Reset Transmitter Command (TxRDY interrupt)
Write TB (TxRDY Interrupt)
Reset Break Change Interrupt Command (Delta Break Interrupt)
Stop Counter/Timer Command (Counter/Timer Interrupt)
Read IPCR (Input Port Change Interrupt)
Write IMR (Clear a Mask Bit)
tIR
300
ns
t PS
R
OP0-
OP7
IP0-
IP6
OLD DATA
NEW DATA
W
tPD
tPH
t IR
R or W and CS
IRQ or OP3-OP7
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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