R01DS0140ED0100_FJ4_15 Datasheet, PDF (26/78 Pages) Renesas Technology Corp – 32-bit Single-Chip Microcontroller

Chapter 4
Chapter 4 Clock generators
Clock generators
4.1 CPU clock
Table 4-1 CPU clock frequency
Parameter
Symbol
Condition
CPU clock frequency
fCPU
PLL based
SSCG based
Ratings
Min Typ Max
-
-
80
-
- 88.32
Unit
MHz
MHz
4.2 Peripheral clock
Table 4-2 Peripheral clock frequency
Parameter
Symbol
Condition
Ratings
Unit
Min Typ Max
Peripheral clock
frequency
fPERI
-
-
48^a MHz
a) _{Some peripherals can be operated at 80MHz. Refer to the chapter ‘Clock Selection’ in the UM for}
details.
4.3 Oscillator characteristics
4.3.1 Main oscillator
A ceramic or crystal resonator can be connected to the main clock input pins
as shown in figure 4-1 “Recommended Main Oscillator Circuit”
.
X1
internal
external
X2
Rd
C₁
C₂
Figure 4-1 Recommended Main Oscillator Circuit
Caution Values of C₁, C₂ and R_d and the best setting for MOSCC.AMPSEL[1:0]
register depend on the used ceramic or crystal resonator and must be
specified in cooperation with ceramic or crystal resonator manufacturer.
R01DS0140ED0100
26
Data Sheet