NEC uPD78053 Manuale Utente
48
CHAPTER 1 OUTLINE (
µ
PD78054 Subseries)
1.9 Differences between Standard Quality Grade Products and (A) Products
Table 1-1 shows the differences between the standard quality grade products (
µ
PD78052, 78053, 78054) and (A)
products (
µ
PD78052(A), 78053(A), 78054(A)).
Table 1-1. Differences between Standard Quality Grade Products and (A) Products
Part Number
Standard Quality Grade Products
(A) Products
Item
Quality grade
Standard
Special
Package
• 80-pin plastic QFP
Note 3
80-pin plastic QFP
(14
×
14 mm, Resin thickness : 1.4 mm)
(14
×
14 mm, Resin thickness : 2.7 mm)
• 80-pin plastic TQFP
(Fine pitch) (12
×
12 mm)
Recommended
Refer to separate Data Sheets
soldering conditions
1.10 Mask Options
The mask ROM versions (
µ
PD78052, 78053, 78054, 78055, 78056, 78058) provide pull-up resistor mask options
which allow users to specify whether to connect a pull-up resistor 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
PD78054 subseries are shown in Table 1-2.
Table 1-2. Mask Options of Mask ROM Versions
Pin names
Mask options
P60 to P63
Pull-up resistor connection can be specified in 1-bit units.