UPD30121 NEC [NEC], UPD30121 Datasheet - Page 52

• Manufacturer Part Number: UPD30121
• Description: VR4121TM 64-/32-BIT MICROPROCESSOR
• Manufacturer: NEC [NEC]

52
Remark The broken lines indicate high impedance.
(12) System bus parameter (IOCHRDY) (2/3)
Notes 1. This indicates that there are four possible relationships between BUSCLK signal and other system
MEMR#/MEMW#,
When WISAA (0:2) bits = 010, BSEL bit = 0
BUSCLK
BUSCLK
BUSCLK
BUSCLK
ADD (19:25),
MEMCS16#,
2. This indicates the minimum setup time to the BUSCLK signal rising or falling edge.
IOR#/IOW#
ADD (9:18)
IOCHRDY
ADD (0:8)
IOCS16#
bus interface signals.
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(output)
(input)
(input)
(input)
(input)
ZWS#
DATA
DATA
SHB#
Note 1
Note 1
Note 1
Note 1
Invalid
t
BCLKH1
Invalid
t
BCLKL1
Data Sheet U14691EJ1V0DS00
t
AVCL
t
t
AVSV1
DVCL
t
AVCK
Note 2
t
CLR
t
CLCK
t
CLCH
Note 2
t
RHCH
t
DS
t
t
t
CHAV
CHRL
DH
t
t
CHDV
CHCL
t
CHSV
Invalid
PD30121