µPD31172
(4) System bus interface parameters
(a) Access to I/O area
Parameter
Command signal low-level width
Address setup time (to command signal)
Address hold time (from command signal)
IOCS16# valid delay time
IOCS16# floating delay time
Data output hold time
Symbol
tCLCH
tAVCL
tCHAV
tAVCV
tAVCZ
tDM
Conditions
MIN.
130
10
MAX.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
10
12
10
25
30
6
Data output delay time
tDO
Data input setup time
tDS1
10
10
10
Data input setup timeNote
tDS2
Data input hold time
tDH
Note During 16550-compatible serial communication
AD (24:0)
(input)
t
AVCL
t
CHAV
t
CLCH
IOR#/IOW#
(input)
t
AVCV
t
AVCZ
IOCS16#
(output)
t
DS1
t
t
DH
DH
DATA (31:0)
(input)
t
DS2
DATA (31:0)
(input)Note
t
DM
t
DO
DATA (31:0)
(output)
Note During 16550-compatible serial communication
Remark The broken lines indicate high impedance
21
Data Sheet U14388EJ2V0DS00
NEC [ NEC ]
