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參數(shù)資料
| 型號： | MC68HC705V8 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁數(shù)： | 5/28頁 |
| 文件大?。?/td> | 220K |
| 代理商： | MC68HC705V8 |
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AN1224/D
MOTOROLA
5
Figure 2. MC68HC705V8 Block Diagram
Input/Output
The MC68HC705V8 contains 28 bi-directional I/O lines, divided into three 8-bit I/O ports, designated ports
A, B and C, and one 4-bit I/O port, designated port F. Port A inputs and port C inputs can also be used as
IRQ interrupt sources, while port B shares functions with the 16-bit timer and port F shares functions with
the serial peripheral interface (SPI) port. Two 8-bit input-only ports are also available, designated as ports
D and E. These two ports share functions with the 16-channel A/D converter. The direction of ports A, B, C,
and F are controlled by four data direction registers, one for each I/O port. This allows each I/O line to be
individually configured by the user as either an input or output. The ports and data direction registers are
contained in the first page of the MCU memory map, and can be read or written to directly by the user.
USER
STATIC RAM
512 X 8
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
P
D
16-BIT TIMER
SYSTEM
OSCILLATOR
AND
DIVIDE BY 2
CPU
CPU
CONTROL
W/COP
ALU
IRQ
RESET
OSC1 OSC2
INTERNAL
PROCESSOR
CLOCK
USER EPROM
12032 X 8
BOOTSTRAP
ROM
1008 X 8
ACCUMULATOR
8
A
INDEX
REGISTER
8
X
CONDITION
CODE REG.
5
CC
STACK
POINTER
8
SP
PROGRAM
COUNTER
HIGH
8
PCH
PROGRAM
COUNTER
LOW
8
PCL
PB0
PB1
PB2
PB3
PB4
PB5
TCMP/PB6
TCAP/PB7
P
D
P
D
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
USER EEPROM
128 X 8
PWM
6-BIT PWM
MDLC
BUS
LOAD
REXT1
REXT2
V
SSA
2
MCU POWER
SUPPLY
REGULATION
V
BATT
/V
PP
V
IGN
MISO/PF3
MOSI/PF2
SCLK/PF1
SS/PF0
P
D
P
PD0/AD0
PD1/AD1
PD2/AD2
PD3/AD3
PD4/AD4
PD5/AD5
PD6/AD6
PD7/AD7
V
REFH
V
REFL
P
1
PE0/AD8
PE1/AD9
PE2/AD10
PE3/AD11
PE4/AD12
PE5/AD13
PE6/AD14
PE7/AD15
V
SSA
1
V
CCA
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