參數(shù)資料
型號(hào): MC68HC05P18AMP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 44/130頁
文件大?。?/td> 1310K
代理商: MC68HC05P18AMP
NON-DISCLOSURE
AGREEMENT
REQUIRED
General Description
Technical Data
MC68HC05P18A
General Description
Figure 1-2. User Mode Pinout
1.5.1 Power Supply (VDD and VSS)
Power is supplied to the MCU through VDD and VSS .VDD is connected
to a regulated +5-volt supply and VSS is connected to ground.
Very fast signal transitions occur on the MCU pins. The short rise and
fall times place very high short-duration current demands on the power
supply. To prevent noise problems, take special care to provide good
power supply bypassing at the MCU. Use bypass capacitors with good
high-frequency characteristics and position them as close to the MCU as
possible. Bypassing requirements vary, depending on how heavily the
MCU pins are loaded.
1.5.2 Oscillator Pins (OSC1 and OSC2)
The OSC1 and OSC2 pins are the control connections for the on-chip
oscillator. The OSC1 and OSC2 pins can accept:
1. A crystal or ceramic resonator, as shown in Figure 1-3 (a)
2. An external clock signal, as shown in Figure 1-3 (b)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RESET
IRQ
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
SDO/PB5
SDI/PB6
SCK/PB7
VSS
VDD
OSC1
OSC2
PD7/TCAP
TCMP
PD5/CKOUT
PC0
PC1
PC2
PC3/AD3
PC4/AD2
PC5/AD1
PC6/AD0
PC7/VREFH
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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