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): 75/88頁
文件大小: 726K
代理商: MC68HC2681P
MC68HC2681
A-8
MC68HC681 USER’S MANUAL
MOTOROLA
A
A.4.12.2 RESET TIMING
.
Figure A-3. RESET Timing
A.4.12.3 BUS TIMING
.
Figure A-4. Bus Timing
CHARACTERISTIC
SYMBOL
MIN
MAX
UNIT
RESET Pulse Width
tRES
1.0
CHARACTERISTIC
SYMBOL
MIN
MAX
UNIT
RS1-RS4 Setup to R+CS, W+CS Asserted
tRSS
10
ns
RS1-RS4 Hold After R+CS, W+CS Negated
tRSH
0—
ns
Bus Cycle (R+CS, W+CS) Width
tRW
205
ns
Inactive Time Between Bus Cycles
tRWD
200
ns
Read Access Time from R+CS Asserted
tRD
175
ns
Read Data Valid After R+CS Negated
tD
0-
ns
Data Tri-State After R+CS Negated
tDZ
—25
ns
Write Data Setup to W+CS Negated
tWDS
100
ns
Write Data Hold After W+CS Negated
tWDH
10
ns
RS1-RS4 Setup to R+CS, W+CS Asserted
tRSS
10
ns
RS1-RS4 Hold After R+CS, W+CS Negated
tRSH
0—
ns
RESET
t RES
RS1
-
RS4
CS
R
W
D0-D7
(READ)
D0-D7
(WRITE)
tRSS
tRSH
tRW
tRD
tDZ
tD
tWDS
tWDH
tRWD
VALID
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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