參數(shù)資料
型號: MC68HC05C9AMP
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, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 36/124頁
文件大?。?/td> 774K
代理商: MC68HC05C9AMP
Functional Pin Descriptions
MC68HC05C9A Advance Information Data Sheet, Rev. 5.1
Freescale Semiconductor
19
Figure 1-6. 44-Pin QFP Pin Assignments
NOTE
If MC68HC705C9A devices are to be used in the same socket, pin 43
should be tied to VDD.
1.5.1 VDD and VSS
Power is supplied to the MCU using these two pins. VDD is the positive supply and VSS is ground.
1.5.2 IRQ
This interrupt pin has an option that provides two different choices of interrupt triggering sensitivity.
The IRQ pin contains an internal Schmitt trigger as part of its input to improve noise immunity. Refer to
Chapter 4 Interrupts for more detail.
1.5.3 OSC1 and OSC2
These pins provide control input for an on-chip clock oscillator circuit. A crystal or ceramic resonator
connected to these pins provides a system clock. The internal frequency is one-half the crystal frequency.
1.5.4 RESET
As an input pin, this active low RESET pin is used to reset the MCU to a known startup state by pulling
RESET low. As an output pin, the RESET pin indicates that an internal MCU reset has occurred. The
33
32
31
30
29
28
27
26
25
24
23
PC3
PC2
PC1
PC0
PD0/RDI
PD1/TDO
PD2/MISO
PD3/MOSI
PD4/SCK
PD5/SS
TCMP
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
44
43
42
41
40
38
37
36
35
34
PD7
PC4
PC5
PC6
PC7
V
SS
N/
C
PB7
PB6
PB5
PB4
TCAP
OSC2
OSC1
V
DD
N/C
RESET
IRQ
N/C
PA
7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
PB0
PB1
PB2
PB3
39
N/
C
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