HD6432670 Hitachi, HD6432670 Datasheet - Page 825

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Bit
2
1
0
X: Don’t care
21.1.2
PLLCR sets the frequency multiplication factor used by the PLL circuit.
Bit
7
to
4
3
2
1
0
21.2
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock.
Bit Name
SCK2
SCK1
SCK0
Bit Name
—
—
—
STC1
STC0
PLL Control Register (PLLCR)
Oscillator
Initial Value
0
0
0
Initial Value
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
—
R/W
R/W
R/W
R/W
Description
System Clock Select 2 to 0
Select the division ratio.
000: 1/1
001: 1/2
010: 1/4
011: 1/8
100: 1/16
101: 1/32
11X: Setting prohibited
Description
Reserved
These bits are always read as 0 and cannot be
modified.
Reserved
This bit can be read from or written to. However,
the write value should always be 0.
Reserved
This bit is always read as 0 and cannot be
modified.
Frequency Multiplication Factor
The STC bits specify the frequency multiplication
factor used by the PLL circuit.
00:
01:
10:
11: Setting prohibited
1
2
4
Rev. 2.0, 04/02, page 779 of 906