UPD30121 NEC [NEC], UPD30121 Datasheet - Page 47

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

Remarks 1. Do not set CLKSEL (2:0)
CLKSEL 2
Data access time (from address)
Data access time (from ROMCS (0:3)# )
Data access time (from RD# )
Data input setup time
Data input hold time
Signal
(9) Page ROM parameter (1/2)
Note The value of N is set by using the WROMA (0:2) bits of the BCUSPEEDREG register.
1
1
1
1
0
0
0
0
The value of M is set by using the WPROM (0:1) bits of the BCUSPEEDREG register.
The value of T is set by using the CLKSEL (0:2) signals (TxD/CLKSEL2, RTS#/CLKSEL1, and
DTR#/CLKSEL0 pins).
CLKSEL 1
2. Do not set CLKSEL (2:0)
Signal
signal = 111.
signal = 110, 101 with
131 MHz model.
1
1
0
0
1
1
0
0
Parameter
CLKSEL 0
Signal
1
0
1
0
1
0
1
0
Note
Note
T (ns)
RFU
35
33
30
33
30
33
38
Note
WROMA 2
Symbol
Data Sheet U14691EJ1V0DS00
t
t
ACC1
ACC2
t
t
t
t
OE
DH
Bit
CE
DS
0
0
0
0
1
1
1
1
WROMA 1
Bit
0
0
1
1
0
0
1
1
Condition
WROMA 0
Bit
0
1
0
1
0
1
0
1
(TClock)
N
9
8
7
6
5
4
3
2
T
T
T
T
(N
MIN.
M
N
N
0
5
WPROM
1)
1 Bit
19
19
18
0
0
1
1
29
WPROM
MAX.
0 Bit
PD30121
0
1
0
1
(TClock)
Unit
ns
ns
ns
ns
ns
ns
M
3
2
1
47