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MC68HC11E9VFN 数据手册 - Freescale（飞思卡尔）
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Freescale（飞思卡尔）
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P13P14P15P16P17P18P19P20P90P119Hot
原理图在P12P68P69P80P90
封装尺寸在P121
型号编码规则在P119P121P122
功能描述在P79
技术参数、封装参数在P1P11P12P13P14P15P16P17P18P19P20P21
电气规格在P105P106P107P108P109P110P111P112P113P114P115P116
导航目录
MC68HC11E9VFN数据手册
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PIN DESCRIPTIONS
2-2 TECHNICAL DATA
Figure 2-2 Pin Assignments for 40-Pin DIP
2.1 V
DD
, V
SS
, and EV
SS
Power is supplied to the MCU through V
DD
and V
SS
. V
SS
is the power supply, and
V
SS
is ground. EV
SS
, available on the 44-pin PLCC, is an additional ground pin that
must be grounded with V
SS
. The MCU operates from a single 5-volt (nominal) power
supply. Very fast signal transitions occur on the MCU pins. The short rise and fall times
place high, short duration current demands on the power supply. To prevent noise
problems, provide good power supply bypassing at the MCU. Also, use bypass capac-
itors that have good high-frequency characteristics and situate them as close to the
MCU as possible. Bypass requirements vary, depending on how heavily the MCU pins
are loaded.
2.2 Reset (RESET
)
An active low bidirectional control signal, RESET
, acts as an input to initialize the MCU
to a known startup state. It also acts as an open-drain output to indicate that an internal
failure has been detected in either the clock monitor or COP watchdog circuit. The
CPU distinguishes between internal and external reset conditions by sensing whether
the reset pin rises to a logic one in less than two E-clock cycles after a reset has oc-
curred. It is not advisable to connect an external resistor-capacitor (RC) power-up de-
lay circuit to the reset pin of M68HC11 devices because the circuit charge time
PC7/ADDR7
XIRQ
/V
PP
PD7/R/W
PD6/AS
RESET
IRQ
PD0/RxD
PD1/TxD
PD2/MISO
PD3/MOSI
9
10
11
12
13
14
15
16
17
18
PD4/SCK 19
PD5/SS 20
PC6/ADDR6 8
PC5/ADDR5 7
PC4/ADDR4 6
PC3/ADDR3 5
PC2/ADDR2 4
PC1/ADDR1 3
PC0/ADDR0 2
V
SS
1
PB5/ADDR13
PB6/ADDR14
PB7/ADDR15
PA0/IC3
PA1/IC2
PA2/IC1
PA3/IC4/OC5/OC1
PA5/OC3/OC1
PA7/PAI/OC1
V
DD
30
29
28
27
26
25
24
23
22
21
PB4/ADDR1231
PB3/ADDR1132
PB2/ADDR1033
PB1/ADDR934
PB0/ADDR835
MODB/V
STBY
36
MODA/LIR37
E38
EXTAL39
XTAL40
MC68HC(7)11D3
D3 40-PIN DIP
Fr
ees
cale S
em
iconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...
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