HA457 Datasheet, PDF (10/14 Pages) Intersil Corporation – 95MHz, Low Power, AV = 2, 8 x 8 Video Crosspoint Switch

Waveforms
A2:0, D3:0
CE
WR
LATCH
(EDGE MODE)
HA457
VALID DATA
VALID DATA
t_DS
t_CS
t_DH
t_CH
t_WL
t_WH
t_D
t_L
FIGURE 8. DIGITAL TIMING REQUIREMENTS
WR
LATCH
DATA (N)
DATA (N + 1)
DATA (N + 2)
MASTER REGISTER CONTENTS
DATA (N)
DATA (N + 1)
DATA (N + 2)
SLAVE REGISTER CONTENTS
(EDGE/LEVEL = 0)
DATA (N)
DATA (N + 1)
SLAVE REGISTER CONTENTS
(EDGE/LEVEL = 1)
DATA (N)
DATA (N + 1)
FIGURE 9. PARALLEL PROGRAMMING MODE OPERATION (SER/PAR = 0)
DATA (N + 2)
DATA (N + 2)
NEW DATA FOR
OUT0
NEW DATA FOR
OUT1 TO OUT6
NEW DATA FOR
OUT7
SER IN D3
D2
D1
D0
D3
D2
1ST
WRITE
WR
D3
D2
D1
D0
32ND
WRITE
LATCH
t=0
SLAVE REGISTER CONTENTS
(EDGE/LEVEL = 0)
OLD DATA
SLAVE REGISTER CONTENTS
(EDGE/LEVEL = 1)
OLD DATA
FIGURE 10. SERIAL PROGRAMMING MODE OPERATION (SER/PAR = 1)
10
NEW DATA
NEW DATA