HD64F3048VTF8 Datasheet, PDF (55/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

External
capacitor
0.1 µF
Section 1 Overview
V_CL
5 V operation model
V_CC power
supply
V_CC
3 V operation model
Figure 1.5 Difference between 5 V and 3 V Operation Models
1.4.5 Note on Changeover to H8/3048 Group Mask ROM Version
Care is required when changing from the H8/3048F-ONE with on-chip flash memory to a model
with on-chip H8/3048 Group mask ROM (H8/3048, H8/3047, H8/3045, or H8/3044).
An external capacitor must be connected to the V_CL pin of the H8/3048F-ONE (5 V model). This
V_CL pin occupies the same location as a V_CC pin in the on-chip mask ROM versions. Changeover to
a mask ROM version must therefore be taken into account when undertaking pattern design, etc.,
in the board design stage.
H8/3048F-ONE
(5 V operation model)
V_CC power
supply
V_CC pin
V_CL pin
← Land pattern for mask ROM version
(0 Ω resistance mounted)
← Land pattern for H8/3048F-ONE
(5 V operation model)
(0.1 µF capacitor mounted)
Figure 1.6 Example of Board Pattern Providing for External Capacitor
Rev. 3.00 Sep 27, 2006 page 27 of 872
REJ09B0325-0300