YGV629 Datasheet, PDF (18/26 Pages) YAMAHA CORPORATION – VC1 Video Controller 1

YGV629









z CPU Interface
ɾParallel Interface
No.
Items
Symbol
Min.
Typ.
Max.
Unit Note
1 PS2-0: setup time
t_sA
4
1
2 PS2-0: hold time
t_hA
0
1
3 CS_N: setup time
t_sCS
0
2
4 CS_N: hold time
t_hCS
0
2
5 D7-0: output data turn on time
t_onD
0
6 D7-0: output data turn off time
t_offD
10
7 D7-0: output data valid delay time
t_dD
0
8 D7-0: output data hold time
t_hD
0
9 WAIT_N,READY_N: turn on time
t_onWAIT
0
ns
10 WAIT_N,READY_N: valid delay time t_dWAIT
13
11 WAIT_N,READY_N: turn off time
t_offWAIT
10
12 D7-0: input data setup time
t_sD
t_SYCLK+10
13 D7-0: input data hold time
t_hD
0
14 READY_N: hold time
t_hREADY
0
15 command pulse active time
t_aCMD
2t_SYCLK
3
16 command pulse inhibit time
t_iCMD
4t_SYCLK
3
17 command cycle time
t_cCMD
6t_SYCLK
3
Note1) Regulations for WR_N, RD_N signal. However, in CS_N control, these regulations are for CS_N.
Note2) Conditions to be the control for WR_N, RD_N control. if it does not meet the regulation, the control turns
into the CS_N control.
Note3) The command pulse means a low active pulse, which is made by the OR operation performed between
each of WR_N and RD_N signal and CS_N signal.
ɾCPU Read Cycle
PS2-0
1
2
CS_N
RD_N
D7-0
WAIT_N
3
High-z
High-z
5
10
9
9
READY_N ^High-z
4
6
8
High-z
7
11
High-z
7
14
11
High-z
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4GV629A50