參數(shù)資料
型號: MC68HSC05J1A
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數(shù): 65/128頁
文件大?。?/td> 1620K
代理商: MC68HSC05J1A
Parallel Input/Output (I/O)
Port A
MC68HC05J1A — Rev. 3.0
Technical Data
MOTOROLA
Parallel Input/Output (I/O)
For More Information On This Product,
Go to: www.freescale.com
65
7.4.4 Port A External Interrupts
If the port A external interrupt mask option is selected, the PA3–PA0 pins
serve as external interrupt pins in addition to the IRQ pin.
External interrupt triggering sensitivity is a mask option. The PA3–PA0
pins can be positive edge-triggered or positive edge- and high
level-triggered.
NOTE:
When testing for external interrupts, the BIH and BIL instructions test the
voltage on the IRQ pin, not the state of the internal IRQ signal.
Therefore, BIH and BIL cannot test the port A external interrupt pins.
Figure 7-4
shows the port A I/O logic.
Figure 7-4. Port A I/O Circuit
PAx
EXTERNAL
INTERRUPT
REQUEST
(PINS PA3
PA0)
DATA DIRECTION
REGISTER A
BIT DDRAx
PORT A DATA
REGISTER
BIT PAx
PULLDOWN
REGISTER A
BIT PDIAx
READ $0004
WRITE $0004
WRITE $0000
READ $0000
WRITE $0010
100-
μ
A
PULLDOWN
DEVICE
PULLDOWN DEVICES ENABLED
(MASK OPTION)
RESET
I
8-mA SINK
CAPABILITY
(PINS PA7
PA4)
F
Freescale Semiconductor, Inc.
n
.
相關PDF資料
PDF描述
MC68SZ328 i.MX Integrated Portable System Processor
MC72000 Integrated Bluetooth Radio
MC7445ARX1000LF RISC Microprocessor Hardware Specifications
MC7445ARX1000LG RISC Microprocessor Hardware Specifications
MC7447A PowerPC microprocessor
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