LC87F6D64A Datasheet, PDF (16/19 Pages) Sanyo Semicon Device – FROM 64K byte, RAM 2048 byte on-chip 8-bit 1-chip Microcontroller

LC87F6D64A
Characteristics of a Sample Main System Clock Oscillation Circuit
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 Characteristics of a Sample Main System Clock Oscillator Circuit with a Ceramic Oscillator
Frequency Manufacturer
Oscillator
Circuit Parameters
C1
C2
Rd1
[pF]
[pF]
[Ω]
Operating
Supply
Voltage Range
[V]
Oscillation
Stabilizing Time
typ
max
[ms]
[ms]
Notes
10MHz
CSTCE10M0G52-R0
10
10
1k
MURATA
CSTLS10M0G53-B0
15
15
1k
2.8 to 5.5
3.0 to 5.5
0.029
0.028
4MHz
CSTCR4M00G53-R0
15
MURATA
CSTLS4M00G53-B0
15
15
2.2k
15
2.2k
2.3 to 5.5
2.3 to 5.5
0.034
0.030
The oscillation stabilizing time is a period until the oscillation becomes stable after VDD becomes higher than
minimum operating voltage. (Refer to Figure 4)
Characteristics of a Sample Subsystem Clock Oscillator Circuit
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 Characteristics of a Sample Subsystem Clock Oscillator Circuit with a Crystal Oscillator
Frequency Manufacturer
Oscillator
Circuit Parameters
C3
C4
Rf
Rd2
Operating
Supply Voltage
Range
Oscillation
Stabilizing Time
typ
max
[pF] [pF] [Ω]
[Ω]
[V]
[s]
[s]
Notes
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 Figure 4)
Notes: Since the circuit pattern affects the oscillation frequency, place the oscillation-related parts as close to the
oscillation pins as possible with the shortest possible pattern length.
CF1
CF2
Rf1
Rd1
C1
C2
CF
Figure 1 Ceramic Oscillation Circuit
XT1
XT2
Rf2
Rd2
C3
C4
X’tal
Figure 2 Crystal Oscillation Circuit
0.5VDD
Figure 3 AC Timing Measurement Point
No.A1007-16/19