UPD72001-A8 NEC [NEC], UPD72001-A8 Datasheet - Page 30

• Manufacturer Part Number: UPD72001-A8
• Description: MULTI-PROTOCOL SERIAL CONTROLLERS
• Manufacturer: NEC [NEC]

DMA Cycle Timing
PRO Output Timing
INTAK Cycle Timing
30
output is disabled)
output is enabled)
DRQR
DRQT
(when vector
(when vector
PRO
PRI
INT
X
X
WR
A/B
A/B
RD
INTAK
D7-0
PRI
PRI
INT
RD
Hi-Z
t
WIAL
t
DPIPO
t
t
SPIIA2
SPIIA1
t
DRDIQ
t
DIAIQ
t
t
t
WIAH
DWDQ
DRDQ
t
DIAD
t
DIQPO
PD72001-11, 72001-A8
t
HIAPI2
t
Hi-Z
FIAD
t
HIAPI1