参数资料
型号: MC68HC11D0CFBE3
厂商: Freescale Semiconductor
文件页数: 85/124页
文件大小: 0K
描述: IC MCU 8BIT 3MHZ 44-QFP
标准包装: 480
系列: HC11
核心处理器: HC11
芯体尺寸: 8-位
速度: 3MHz
连通性: SCI,SPI
外围设备: POR,WDT
输入/输出数: 26
程序存储器类型: ROMless
RAM 容量: 192 x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-QFP
包装: 托盘
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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