NEC uPD78P078 - Manual (Page 47)

47
CHAPTER 1 OUTLINE (
µ
PD78078 SUBSERIES)
1.9 Mask Options
The mask ROM versions (
µ
PD78076, 78078) provide pull-up register mask options which allow users to specify
whether to connect a pull-up register to a specific port pin when the user places an order for the device production.
Using this mask option when pull-up resistors are required reduces the number of components to add to the device,
resulting in board space saving.
The mask options provided in the
µ
PD78078 Subseries are shown in Table 1-1.
Table 1-1. Mask Options of Mask ROM Versions
Pin Names Mask Options
P60 to P63, P90 to P93 Pull-up resistor connection can be specified
in 1-bit units.
1.10 Differences with
µ
PD78054 Subseries
The
µ
PD78078 Subseries is upward-compatible with the
µ
PD78054 Subseries. The differences between the two
subseries are shown in the table below. The functions and specifications other than those shown in this table are
common to these two series.
Table 1-2. Differences between
µ
PD78078 Subseries and
µ
PD78054 Subseries
Subseries
µ
PD78054 Subseries
µ
PD78078 Subseries
Item
No. of I/O ports 69 88
8-bit timer/event counter 2 channnels 4 channels
External device Address bus separate function Address bus separate function
expansion function is not provided. is provided. (P80/A0 to P87/A7)
Power supply voltage V DD = 2.0 to 6.0 V V DD = 1.8 to 5.5 V
Package 80-pin plastic TQFP (12 x 12 mm) 100-pin plastic TQFP (14 x 14 mm)
80-pin plastic QFP (14 x 14 mm) 100-pin plastic LQFP (14 x 14 mm)
80-pin plastic WQFP (14 x 14 mm)* 100-pin plastic QFP (14 x 20 mm)
100-pin plastic WQFP (14 x 20 mm)*
* : Only for PROM version * : Only for PROM version