LC876694B/78B/62B
No.6843-20/23
Main system clock oscillation circuit characteristics
The characteristics in the table bellow is based on the following conditions:
1. Use the standard evaluation board SANYO has provided.
2. Use the peripheral parts with indicated value externally.
3. The peripheral parts value is a recommended value of oscillator manufacturer
Table 1. Main system clock oscillation circuit characteristics using ceramic resonator
Circuit parameters
Oscillation
stabilizing time
Frequency Manufacturer Oscillator
C1 C2 Rd1
Operating
supply
voltage
range
typ max
Notes
10MHz
4MHz
The oscillation stabilizing time is a period until the oscillation becomes stable after VDD becomes higher than minimum
operating voltage. (Refer to Figure4)
Subsystem clock oscillation circuit characteristics
The characteristics in the table bellow is based on the following conditions:
1. Use the standard evaluation board SANYO has provided.
2. Use the peripheral parts with indicated value externally.
3. The peripheral parts value is a recommended value of oscillator manufacturer
Table 2. Subsystem clock oscillation circuit characteristics using crystal oscillator
Circuit parameters
Oscillation
stabilizing time
Frequency Manufacturer Oscillator
C3 C4 Rf Rd2
Operating
supply voltage
range
typ max
Notes
32.768kHz
The oscillation stabilizing time is a period until the oscillation becomes stable after executing the instruction which starts the
sub-clock oscillation or after releasing the HOLD mode. (Refer to Figure4)
(Notes) • Since the circuit pattern affects the oscillation frequency, place the oscillation-related parts as close tothe
oscillation pins as possible with the shortest possible pattern length.
Figure 1 Ceramic oscillation circuit Figure 2 Crystal oscillation circuit
C3
Rd2
C4
X’tal
XT2 XT1
Rf
C1
C2
CF
CF2 CF1
Rd1
