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| 型号： | MC68HC11D3CFB1 |
| 厂商： | ABILIS SYSTEMS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 1 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | 10 X 10 MM, QFP-44 |
| 文件页数： | 85/124页 |
| 文件大小： | 6875K |
| 代理商： | MC68HC11D3CFB1 |
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PARALLEL I/O
TECHNICAL DATA
6-1
SECTION 6
PARALLEL I/O
The MC68HC11D3 has four 8-bit I/O ports; A, B, C, and D. In single-chip and bootstrap
modes, all ports are parallel I/O data ports. In expanded multiplexed and test modes,
ports B and C, and lines DATA6/AS and DATA7/R/W are a memory expansion bus
with port B as the high order address bus, port C as the multiplexed address and data
bus, AS as the demultiplexing signal, and R/W as the data bus direction control. Refer
to Table 6-1, which is a summary of the ports and their shared functions:
6.1 Port A
Port A bits handle the timer functions and can also be used as general-purpose I/O. In
both the normal operating modes, port A can be configured for four timer input capture
(IC) and three timer output compare (OC) functions, or four OC and three IC functions
with either a pulse accumulator input (PAI) or a fifth OC function.
*This pin is not bonded in the 40-pin version.
6.2 Port B
In single-chip mode, all port B pins are general-purpose I/O (PB[7:0]). In expanded
multiplexed mode, all port B pins act as high-order address bits (ADDR[15:8]).
Table 6-1 I/O Ports
Port
Input Pins
Output Pins
Bidirectional Pins
Shared Functions
Port A
3
2
TImer
Port B
—
8
High Order Address
Port C
—
8
Low Order Address and Data Bus
Port D
—
8
SCI, SPI, AS, and R/
PORTA — Port A Data
$0000
Bit 7
654321
Bit 0
PA7
PA6*
PA5
PA4*
PA3
PA2
PA1
PA0
RESET:
HiZ
0
HiZ
Alt. Func:
PAI
OC2
OC3
OC4
IC4/OC5
IC1
IC2
IC3
And/or:
OC1
—
PORTB — Port B Data
$0004
Bit 7
654321
Bit 0
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
S. Chip
or Boot:
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
RESET:
Reset configures pins as HiZ inputs
Expan.
or Test:
ADDR15
ADDR14
ADDR13
ADDR12
ADDR11
ADDR10
ADDR9
ADDR8
RESET:
Reset configures pins as high-order address outputs
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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| MC68HC11D3CFB3 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
| MC68HC11D3CFB4 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ROM-based high-performance microcontrollers |
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| MC68HC11D3CFN2 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Microcontrollers |
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