參數(shù)資料
型號: MC68HSC05C9AP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 117/162頁
文件大?。?/td> 1093K
代理商: MC68HSC05C9AP
N
O
N-D
I
SC
L
O
SU
R
E
AG
R
EEMENT
R
E
Q
U
IR
ED
Input/Output Ports
Advance Information
MC68HC05C9A Rev. 5.0
58
Input/Output Ports
MOTOROLA
Figure 7-1. Port A I/O Circuit
7.4 Port B
Port B is an 8-bit bidirectional port. The port B data register is at $0001
and the data direction register (DDR) is at $0005. The contents of the
port B data register are indeterminate at initial powerup and must be
initialized by user software. Reset does not affect the data registers, but
clears the data direction registers, thereby returning the ports to inputs.
Writing a one to a DDR bit sets the corresponding port pin to output
mode. Each of the port B pins has an optional external interrupt
capability that can be enabled by mask option.
The interrupt option also enables a pullup device when the pin is
configured as an input. The edge or edge- and level-sensitivity of the
IRQ pin will also pertain to the enabled port B pins. Care needs to be
taken when using port B pins that have the pullup enabled. Before
switching from an output to an input, the data should be preconditioned
to a 1 to prevent an interrupt from occurring. The port B logic is shown in
Figure 7-2.
DATA DIRECTION
REGISTER BIT
LATCHED OUTPUT
DATA BIT
I/O
PIN
INPUT
REG.
BIT
INPUT
I/O
OUTPUT
INTERNAL
HC05
CONNECTIONS
相關PDF資料
PDF描述
MC68HSC05C9ACP 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP40
MC68HC05C9AMP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40
MC68HC05C9AMFN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
MC68HC05C9AFB 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
MC68HC05C9AMB 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP42
相關代理商/技術參數(shù)
參數(shù)描述
MC68HSC705C8ACFB 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 304 BYTES RAM - Bulk
MC68HSC705C8ACP 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HSC705C8ACS 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HSC705J1ACDW 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HSC705J1ACP 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 64 BYTES RAM - Bulk