CHAPTER 1 OUTLINE (µPD78070A)
1.8 Differences between µPD78078 Subseries and µPD78070A
The µPD78070A is a ROM-less version of the µPD78078 Subseries. Table 1-1 shows the differences between
the µPD78070A and the µPD78078 Subseries. Other than the differences shown in Table 1-1, the µPD78070A has
the same functions as the µPD78078 Subseries.
For details of the µPD78078 Subseries, refer to µPD78078 and µPD78078Y Subseries User’s Manual
(U10641E).
For the electrical specifications of these products, refer to their data sheets.
Table 1-1. Differences between µPD78078 Subseries and µPD78070A
Part Number
µPD78078 Subseries
48 to 60 Kbytes
µPD78070A
Item
Internal ROM
Internal expansion RAM
None
None
61
1024 bytes
I/O ports
Total
88
2
CMOS input
CMOS I/O
78
8
51
N-ch open drain I/O
Pins withNote
added function
Pins with pull-up resistor 86 (78)
51
Middle-voltage pins
LED direct drive outputs
Bus mode
8
None
4
16
External
Multiplexed bus mode or separate Separate bus mode only
bus mode can be selected.
expansion functions
Memory expansion mode Four types of memory expansion
modes can be selected.
Full address mode only
ROM correction function
Power supply voltage
Provided
None
VDD = 1.8 to 5.5 V
VDD = 2.7 to 5.5 V
Note Pins with added function are included in the number of I/O ports.
Remark Numbers in parentheses are for the µPD78P078.
44
ETC [ ETC ]
