User manual

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

or 2

Note

(Fixed to 2

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

38 (GB)

Others Noise immunity and noise radiation vary with the circuit scale and mask

layout.

Note 2

(21.8 ms at 6.0 MHz, 31.3 ms at 4.19 MHz)

(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.