UPD30121 NEC [NEC], UPD30121 Datasheet - Page 54

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

54
Address setup time (to BUSCLK)
Address setup time (to command signal )
Command signal setup time (to BUSCLK)
Command signal low-level width
Address hold time (from command signal )
Command signal recovery time
ZWS#
ZWS# hold time (from command signal )
Data output setup time (to command signal )
Data output hold time (from command signal )
MEMCS16#/IOCS16# sampling start time
MEMCS16#/IOCS16# hold time (from command
signal )
Data input setup time
Data input hold time
(13) System bus parameter (ZWS#) (1/2)
Notes 1. With the V
Remarks 1. Do not set CLKSEL (2:0) signal
CLKSEL2
Note 1
delay time from command signal
Signal
2. The value of N is set by using the WISAA (0:2) bits of the BCUSPEEDREG register.
1
1
1
1
0
0
0
0
the system bus interface.
The value of T is set by using the CLKSEL (0:2) signals (TxD/CLKSEL2, RTS#/CLKSEL1, and
DTR#/CLKSEL0 pins).
2. Do not set CLKSEL (2:0) signal
= 111.
= 110, 101 with 131 MHz model.
CLKSEL1
Parameter
Signal
1
1
0
0
1
1
0
0
R
4121, the MEMW#, MEMR#, IOW#, and IOR# signals are called the command signals for
Notes 1, 2
Notes 1, 2
CLKSEL0
Signal
1
0
1
0
1
0
1
0
Note 1
Note 2
Note 1
Notes 1, 2
Notes 1, 2
Note 1
Note 1
Note 1
Data Sheet U14691EJ1V0DS00
T (ns)
RFU
35
33
30
33
30
33
38
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
AVSV2
AVCK
AVCL
CLCK
CLCH
CHAV
CHCL
CHZH
DVCL
CHDV
CHSV
CLZL
t
t
DS
DH
Note If the WISAA (0:2) bits are set to 100 or
WISAA2 Bit
Condition
1
1
Note
Note
0
0
0
0
1
1
high, the AC characteristics of t
t
AVCK
are not guaranteed.
WISAA1 Bit
0
0
T
Note
Note
0
0
1
1
1
1
2
T
T
(N + 1)
T
MIN.
– 44
N
N
15
15
25
25
0
0
0
0
5
(N – 1)
WISAA0 Bit
29
19
0
1
29
Note
Note
0
1
0
1
0
1
T
(N
MAX.
CLCK
N (TClock)
1)
and
8
7
6
5
4
3
20
PD30121
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns