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參數(shù)資料
| 型號(hào)： | LC87F72C8A |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 8-Bit Single Chip Microcontroller with 128 KB Flash Memory and 2048-Byte RAM On Chip |
| 中文描述： | 8位單片機(jī)微控制器128 kB的閃存和2048字節(jié)的片上內(nèi)存 |
| 文件頁數(shù)： | 21/24頁 |
| 文件大小： | 717K |
| 代理商： | LC87F72C8A |
LC87F72C8A
No.6712-21/24
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
typ
0.09ms
0.09ms
0.07ms
0.07ms
Frequency
Manufacturer
Oscillator
C1
33pF 33pF 470
C2
Rd1
Operating
supply voltage
range
max
0.4ms
0.4ms
0.2ms
0.2ms
Notes
CSA10.0MTZ
CST10.0MTW (30pF) (30pF) 470
CSA4.00MG
33pF 33pF 680
CST4.00MGW (30pF) (30pF) 680
4.5 – 5.5V
4.5 – 5.5V
3.0 – 5.5V
3.0 – 5.5V
Murata
Built in C1,C2
Built in C1,C2
10MHz
Murata
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
typ
1.0s
Frequency
Manufacturer
Oscillator
C3
18pF 18pF OPEN 390k
C4
Rf
Rd2
Operating
supply voltage
range
max
3.0s
Notes
C-002RX
MC-306
32.768MHz
Seiko EPSON
3.0 – 5.5V
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 to
the oscillation pins as possible with the shortest possible pattern length.
Figure 1 Ceramic oscillation circuit
Figure 2 Crystal oscillation circuit
C1
C2
CF
CF2
CF1
C3
Rd2
C4
X’tal
XT2
XT1
Rf
Rd1
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