XC68HC05P18A Motorola, XC68HC05P18A Datasheet - Page 20
![no-image](/images/manufacturer_photos/0/4/459/motorola_sml.jpg)
XC68HC05P18A
Manufacturer Part Number
XC68HC05P18A
Description
HCMOS Microcontroller Unit
Manufacturer
Motorola
Datasheet
1.XC68HC05P18A.pdf
(130 pages)
- Current page: 20 of 130
- Download datasheet (2Mb)
General Description
1.5.1 Power Supply (V
1.5.2 Oscillator Pins (OSC1 and OSC2)
Technical Data
20
Power is supplied to the MCU through V
to a regulated +5-volt supply and V
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.
The OSC1 and OSC2 pins are the control connections for the on-chip
oscillator. The OSC1 and OSC2 pins can accept:
DD
1. A crystal or ceramic resonator, as shown in
2. An external clock signal, as shown in
and V
SS
)
General Description
SDO/PB5
SCK/PB7
SDI/PB6
Figure 1-2. User Mode Pinout
RESET
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
IRQ
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SS
is connected to ground.
DD
28
27
26
25
24
23
22
21
20
19
18
17
16
15
and V
Figure 1-3
V
OSC1
OSC2
PD7/TCAP
TCMP
PD5/CKOUT
PC0
PC1
PC2
PC3/AD3
PC4/AD2
PC5/AD1
PC6/AD0
PC7/V
DD
SS
Figure 1-3
REFH
. V
DD
(b)
MC68HC05P18A
is connected
MOTOROLA
(a)
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