h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 786

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 25 Electrical Characteristics
Rev. 4.00 Jun 06, 2006 page 732 of 1004
REJ09B0301-0400
External capacitor for
stabilizing power supply
0.47 µF
one or two
connected
in series
For products incorporating an internal step-down
circuit, do not connect the VCL pin to the V
power supply. (The VCC1 pin must be connected
to the V
The power supply stabilization capacitor must be
connected to the VCL pin. Use a monolithic
ceramic capacitor of 0.47 µF (one or two
connected in series) and locate it near the pins.
In case the power supply voltage is lower than
3.6 V, connect the capacitor in the same way as
the case with no step-down cirucit incorporated.
<Products incorporating internal step-down
circuit>
HD6432138S, HD6432138SW,
HD6432137S, HD6432137SW,
HD6432134S, HD6432133S,
HD64F2138A, HD64F2134A
Figure 25.3 Connection of External Capacitor (Mask ROM Type Incorporating
CC
Step-Down Circuit and Product Not Incorporating Step-Down Circuit)
power supply as usual.)
VCL
VSS
Product
incorporating
internal
step-down
circuit
CC
By-pass
capacitor
The location of the VCC2 (V
pin in the product not incorporatig an internal
step-down cirucit, is the same as the VCL pin in
a product incorporating an internal step-down
circuit.
It is recommended that the by-pass capacitors
are connected to the power supply terminal
(these are reference values).
<Products not incorporating internal step-down
circuit>
HD64F2138,
HD64F2134, HD64F2132R,
HD6432132, HD6432130,
HD6432138SV, HD6432138SVW,
HD6432137SV, HD6432137SVW,
HD6432134SV, HD6432133SV,
HD64F2138AV, HD64F2134AV
10 µF
V
CC
power supply
0.01 µF
VCC2
VSS
CC
power supply)
Product not
incorporating
step-down
circuit