參數(shù)資料
型號(hào): MSC1213Y3PAGT
廠商: TEXAS INSTRUMENTS INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP64
封裝: GREEN, PLASTIC, TQFP-64
文件頁(yè)數(shù): 2/111頁(yè)
文件大?。?/td> 1102K
代理商: MSC1213Y3PAGT
MSC1211, MSC1212
MSC1213,MSC1214
SBAS323G JUNE 2004 REVISED OCTOBER 2007
www.ti.com
10
EXPLANATION OF THE AC SYMBOLS
Each Timing Symbol has five characters. The first character is always ’t’ (= time). The other characters, depending on their positions, indicate the name of a signal
or the logical status of that signal. The designators are:
A
Address
C
Clock
D
Input Data
H
Logic Level High
I
Instruction (program memory contents)
L
Logic Level Low, or ALE
P
PSEN
Q
Output Data
R
RD Signal
t
Time
V
Valid
W
WR Signal
X
No Longer a Valid Logic Level
Z
Float
Examples:
(1) tAVLL = Time for address valid to ALE Low.
(2) tLLPL = Time for ALE Low to PSEN Low.
t
LHLL
t
AVLL
t
LLPL
t
PLPH
t
LLIV
t
LLAX
t
PLAZ
t
PXIZ
t
PXIX
t
AVIV
t
PLIV
A0A7
A8A15
INSTR IN
ALE
PSEN
PORT 0
PORT 2
Figure 1. External Program Memory Read Cycle
t
AVLL
ALE
RD
PSEN
PORT 0
PORT 2
A0A7
from RI or DPL
DATA IN
A0A7 from PCL
INSTR IN
P2.0P2.7 or A8A15 from DPH
A8A15 from PCH
t
AVDV
t
LLDV
t
WHLH
t
RLRH
t
LLWL
t
LLAX
t
RLAZ
t
RHDX
t
RLDV
t
AVWL
t
RHDZ
Figure 2. External Data Memory Read Cycle
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