LC877256A 查看數據表（PDF） - SANYO -> Panasonic

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产品描述 (功能)

比赛名单

LC877256A

8-Bit Single Chip Microcontroller with 64/56/48 KB ROM and 2048-Byte RAM On Chip

SANYO -> Panasonic 

LC877264A/56A/48A

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

Frequency

10MHz

Table 1. Main system clock oscillation circuit characteristics using ceramic resonator

Manufacturer

Oscillator

Operating

Oscillation

Circuit parameters

supply voltage stabilizing time

Notes

C1 C2 Rd1

range

typ max

Murata

CSA10.0MTZ 33pF 33pF 470Ω 4.5 – 6.0V 0.06ms 0.3ms

CST10.0MTW (30pF) (30pF) 470Ω 4.5 – 6.0V 0.06ms 0.3ms Built in C1,C2

4MHz

Murata

CSA4.00MG 33pF 33pF 680Ω 2.5 – 6.0V 0.05ms 0.2ms

CST4.00MGW (30pF) (30pF) 680Ω 2.5 – 6.0V 0.05ms 0.2ms Built in C1,C2

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

Frequency Manufacturer Oscillator

Circuit parameters

Operating

Oscillation

supply voltage stabilizing time Notes

C3 C4 Rf Rd2

range

typ max

32.768MHz Seiko EPSON C-002RX 18pF 18pF OPEN 390kΩ 2.5 – 6.0V

1.0s 3.0s

MC-306

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.

CF1

CF2

Rd1

C1

CF

C2

Figure 1 Ceramic oscillation circuit

XT1

C3

Rf

X’tal

XT2

Rd2

C4

Figure 2 Crystal oscillation circuit

No.6719-21/24

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