UPD30121 NEC [NEC], UPD30121 Datasheet - Page 62

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

62
HLDRQ# input pulse width
Data floating delay time
Data valid delay time
HLDRQ# input pulse width
Data floating delay time
Data valid delay time
MRAS (0:3)# precharge time
UCAS#/LCAS# setup time
(17) Bus hold parameter (1/2)
Note The value of T is set by using the CLKSEL (0:2) signals (TxD/CLKSEL2, RTS#/CLKSEL1, and
DTR#/CLKSEL0 pins).
Parameter
Note
Note
Remarks 1. Do not set CLKSEL (2:0) signal
Symbol
CLKSEL2
t
t
t
t
t
t
t
t
FOFF
SOFF
Signal
FON
SON
FHP
SHP
RPS
CSR
1
1
1
1
0
0
0
0
In Fullspeed/Standby mode
In Fullspeed/Standby mode
In Fullspeed/Standby mode
In Suspend mode
In Suspend mode
In Suspend mode
In Suspend mode
In Suspend mode
2. Do not set CLKSEL (2:0) signal
Data Sheet U14691EJ1V0DS00
CLKSEL1
= 111.
= 110, 101 with 131 MHz model.
Signal
1
1
0
0
1
1
0
0
Condition
CLKSEL0
Signal
1
0
1
0
1
0
1
0
T (ns)
RFU
35
33
30
33
30
33
38
MIN.
12T
110
5T
0
0
0
0
5
MAX.
PD30121
Unit
ns
ns
ns
ns
ns
ns
ns
ns