參數(shù)資料
型號: MC68HC05CL48
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.802 MHz, MICROCONTROLLER, PQFP112
封裝: TQFP-112
文件頁數(shù): 79/145頁
文件大小: 673K
代理商: MC68HC05CL48
June 11, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL48
INTERRUPTS
MOTOROLA
REV 2.0
4-7
To prevent unwanted interrupts generated on KBI[3:7] pins. A logic ‘1’ should be
written to these pins before setting their corresponding interrupt enable bits.
Figure 4-3. Keyboard Interrupt Circuitry
4.3.2.3
External Interrupt Control Register (EXICR $001D)
KBE[7:3]
1 =
Enable Keyboard interrupt on PTA[7:3] respectively.
0 =
Disable Keyboard interrupt on PTA[7:3] respectively.
IRQE[2:0]
1 =
Enable IRQ interrupt on PTA[2:0] respectively.
0 =
Disable IRQ interrupt PTA[2:0] respectively.
76543210
EXICR
$001D
READ
KBE7
KBE6
KBE5
KBE4
KBE3
IRQ2E
IRQ1E
IRQ0E
WRITE
RESET
00000000
VDD
External pins PTA[3.7]
Pad
Logic
Internal Data bits [3.7], Port A
DDR(3-7)
KBE[3.7]
100k
KBI[3.7]
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