HD6417616 RENESAS [Renesas Technology Corp], HD6417616 Datasheet - Page 140

• Manufacturer Part Number: HD6417616
• Description: 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 3 Oscillator Circuits and Operating Modes
3.2.5
Using the frequency modification register (FMR), it is possible to specify the operating frequency
division ratio for the internal clocks (I , E , P ). The internal clock frequency is determined under
the control of PLL circuits 1 and 2 and dividers DIVM, DIVE, and DIVP.
Frequency Modification Register (FMR): The frequency modification register is initialized only
by a power-on reset via the RES pin, and not by an internal reset resulting from WDT overflow.
Its initial value depends on the settings of pins MD2–MD0. Table 3.4 shows the relationship
between the MD2–MD0 pin combinations and the initial value of the frequency modification
register.
Table 3.4
Clock Mode
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
The register configuration is shown in table 3.5.
Table 3.5
Note: * The initial value depends on the clock mode.
Rev. 2.00 Mar 09, 2006 page 114 of 906
REJ09B0292-0200
Name
Frequency modification register
Operating Frequency Selection by Register
Relationship between Clock Mode Pin Settings and Initial Value of Frequency
Modification Register
Register Configuration
MD2
0
0
0
0
1
1
1
MD1
0
0
1
1
0
0
1
Abbreviation
FMR
MD0
0
1
0
1
0
1
0
R/W
R/W
Initial Value
See table 3.4 *
Initial Value
H'00
H'40
H'60
H'A6
H'E0
Address
H'FFFFFE90