HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 140

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

When Using a PLL Oscillator Circuit: Keep the wiring short from the PLL V
connection pattern to the power supply pins, and make the pattern width large, to minimize the
inductance component. Ground the oscillation stabilization capacitors C1 and C2 to V
and V
locate a wiring pattern in the vicinity.
3.3
Pins MD3 and MD4 are used to specify the bus width of the CS0 area The pin combination and
functions are listed in table 3.6. Do not switch the MD4 and MD3 pins while they are operating.
Switching them will cause operating errors.
Table 3.6
MD4
0
0
1
1
122
SS
(PLL2), respectively. Place C1 and C2 close to the CAP1 and CAP2 pins and do not
Bus Width of the CS0 Area
Figure 3.6 Points for Attention when Using PLL Oscillator Circuit
Bus Width of the CS0 Area
Pin
MD3
0
1
0
1
V
V
SS
CC
CAP1
CAP2
(PLL)
(PLL)
C2
Avoid crossing
signal lines
Function
8-bit bus width selected
16-bit bus width selected
32-bit bus width selected
Setting prohibited
C1
V
V
CC
SS
Power supply
Reference values
C1 = 470 pF
C2 = 470 pF
CC
and V
SS
(PLL1)
SS