NEC PD750004 Manuale Utente
4
µPD750008 USER'S MANUAL
1.3
DIFFERENCES AMONG SUBSERIES PRODUCTS
Item
µPD750004
µPD750006
µPD750008
µPD75P0016
Program counter
12 bits
13 bits
14 bits
Program memory (byte)
Masked ROM
Masked ROM
Masked ROM
One-time PROM
4096
6144
8192
16384
Data memory (x 4 bits)
512
Mask
Pull-up resistors at
Incorporated
None
option
ports 4 and 5
(Whether to incorporate pull-up resistors can
(Cannot be
be specified.)
incorporated.)
Wait time during
Available
Not available
RESET
(Can be selected from 2
17
/f
X
or 2
15
/f
X
.)
Note
(Fixed to 2
15
/f
X
.)
Selection to use
Yes
No
feedback resistors
(Whether to enable feedback resistors can
(Use of feedback
for subsystem clock
be specified.)
resistors is factory-set)
Pin
6-9 (CU)
P33-30
P33/MD3-P30/MD0
connection
23-26 (GB)
20 (CU)
IC
V
PP
38 (GB)
Others
Noise immunity and noise radiation vary with the circuit scale and mask
layout.
layout.
Note 2
17
/f
X
(21.8 ms at 6.0 MHz, 31.3 ms at 4.19 MHz)
2
15
/f
X
(5.46 ms at 6.0 MHz, 7.81 ms at 4.19 MHz)
Caution The noise immunity and noise radiation of the PROM model differ from those of the mask
ROM model. If you replace the PROM model with the ROM model of the course of
experimental production to mass production, perform thorough evaluation by using the
CS model (not ES model) of the mask ROM model.
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