參數(shù)資料
型號: SSD1905QT2
廠商: Electronic Theatre Controls, Inc.
英文描述: LCD Graphics Controller CMOS
中文描述: LCD圖形控制器的CMOS
文件頁數(shù): 78/153頁
文件大小: 863K
代理商: SSD1905QT2
SSD1905
Rev 1.3
10/2002
SOLOMON
69
Table 10-6 : Motorola MC68K #1 Interface Timing
Symbol
f
CLK
T
CLK
t
1
t
2
t
3
Parameter
Min
1/f
CLK
6
6
1
Max
66
Units
MHz
ns
ns
ns
ns
Bus Clock frequency
Bus Clock period
Clock pulse width high
Clock pulse width low
A[16:1], M/R# setup to first CLK rising edge where CS# = 0,
AS#=0,UDS#=0,and LDS#=0
A[16:1], M/R# hold from AS# rising edge
CS# setup to CLK rising edge while AS#, UDS#/LDS# = 0
CS# hold from AS# rising edge
AS# asserted for MCLK = BCLK
AS# asserted for MCLK = BCLK
÷
2
AS# asserted for MCLK = BCLK
÷
3
AS# asserted for MCLK = BCLK
÷
4
AS# setup to CLK rising edge while CS#, AS#, UDS#/LDS# =0
AS# setup to CLK rising edge
UDS#/LDS# setup to CLK rising edge while CS#, AS#,
UDS#/LDS# = 0
UDS#/LDS# high setup to CLK rising edge
First CLK rising edge where AS#=1 to DTACK# high
impedance
R/W# setup to CLK rising edge before all CS#, AS#, UDS#
and/or LDS# = 0
R/W# hold from AS# rising edge
AS# = 0 and CS# = 0 to DTACK# driven high
AS# rising edge to DTACK# rising edge
D[15:0] valid to third CLK rising edge where CS# = 0, AS# = 0
and either UDS# = 0 or LDS# = 0 (write cycle) (see note 1)
D[15:0] hold from DTACK# falling edge (write cycle)
UDS# = 0 and/or LDS# = 0 to D[15:0] driven (read cycle)
DTACK# falling edge to D[15:0] valid (read cycle)
UDS#, LDS# rising edge to D[15:0] high impedance (read
cycle)
t
4
t
5
t
6
t
7a
t
7b
t
7c
t
7d
t
8
t
9
t
10
0
1
0
1
2
1
ns
ns
ns
T
CLK
T
CLK
T
CLK
T
CLK
ns
T
CLK
ns
13
18
23
28
t
11
t
12
2
3
ns
ns
14
t
13
1
ns
t
14
t
15
t
16
t
17
0
3
4
0
ns
ns
ns
ns
13
16
t
18
t
19
t
20
t
21
0
3
3
ns
ns
ns
ns
13
2
13
1. t
17
is the delay from when data is placed on the bus until the data is latched into the write buffer.
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