參數(shù)資料
型號: MC68CK338CPV14B1
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144
封裝: TQFP-144
文件頁數(shù): 34/133頁
文件大小: 817K
代理商: MC68CK338CPV14B1
MC68CK338
MOTOROLA
MC68CK338TS/D
129
Figure 39 Background Debugging Mode Timing Diagram —
Freeze Assertion
NOTES:
1. All AC timing is shown with respect to 20% VDD and 70% VDD levels unless otherwise noted.
2. When the previous bus cycle is not an ECLK cycle, the address may be valid before ECLK goes low.
3. Address access time = tEcyc – tEAD – tEDSR.
4. Chip select access time = tEcyc – tECSD – tEDSR.
Table 73 ECLK Bus Timing
(V
DD
and V
DDSYN
= 2.7 to 3.6 Vdc, V
SS
= 0 Vdc, T
A
= T
L
to T
H)
1
Num
Characteristic
Symbol
Min
Max
Unit
1A
ECLK Period
tEcyc
555
ns
2A, 3A ECLK Pulse Width
tECW
277.5
ns
E1
ECLK Low to Address Valid2
tEAD
—70
ns
E2
ECLK Low to Address Hold
tEAH
10
ns
E3
ECLK Low to CS Valid (CS delay)
tECSD
140
ns
E4
ECLK Low to CS Hold
tECSH
10
ns
E5
CS Negated Width
tECSN
35
ns
E6
Read Data Setup Time
tEDSR
35
ns
E7
Read Data Hold Time
tEDHR
5—
ns
E8
ECLK Low to Data High Impedance
tEDHZ
130
ns
E9
CS Negated to Data Hold (Read)
tECDH
0—
ns
E10
CS Negated to Data High Impedance
tECDZ
—1
tcyc
E11
ECLK Low to Data Valid (Write)
tEDDW
—2
tcyc
E12
ECLK Low to Data Hold (Write)
tEDHW
10
ns
E13
Address Access Time (Read)3
tEACC
450
ns
E14
Chip Select Access Time (Read)4
tEACS
380
ns
E15
Address Setup Time
tEAS
1/2
tcyc
68300 BDM FRZ TIM
B8
CLKOUT
FREEZE
IFETCH/DSI
B6
B7
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