參數(shù)資料
型號： MC9S12KT256VPVE
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
封裝： LQFP-112
文件頁數(shù)： 538/654頁
文件大?。?/td> 3576K
代理商： MC9S12KT256VPVE
Chapter 19 Multiplexed External Bus Interface (MEBIV3)
MC9S12KT256 Data Sheet, Rev. 1.16
Freescale Semiconductor
583
19.3.2.13 Reserved Register
This register location is not used (reserved). All bits in this register return logic 0s when read. Writes to
this register have no effect.
This register is not in the on-chip memory map in expanded and special peripheral modes. Therefore, these
accesses will be echoed externally.
19.3.2.14 IRQ Control Register (IRQCR)
Read: See individual bit descriptions below
Write: See individual bit descriptions below
Module Base + 0x000F
Starting address location affected by INITRG register setting.
76543210
R
00000000
W
Reset
00000000
= Unimplemented or Reserved
Figure 19-17. Reserved Register
Module Base + 0x001E
Starting address location affected by INITRG register setting.
76543210
R
IRQE
IRQEN
000000
W
Reset
01000000
= Unimplemented or Reserved
Figure 19-18. IRQ Control Register (IRQCR)
Table 19-12. IRQCR Field Descriptions
Field
Description
7
IRQE
IRQ Select Edge Sensitive Only
Special modes: read or write anytime
Normal and Emulation modes: read anytime, write once
0 IRQ congured for low level recognition.
1 IRQ congured to respond only to falling edges. Falling edges on the IRQ pin will be detected anytime
IRQE = 1 and will be cleared only upon a reset or the servicing of the IRQ interrupt.
6
IRQEN
External IRQ Enable
Normal, emulation, and special modes: read or write anytime
0 External IRQ pin is disconnected from interrupt logic.
1 External IRQ pin is connected to interrupt logic.
Note: When IRQEN = 0, the edge detect latch is disabled.
相關(guān)PDF資料
PDF描述
MC9S12KT256MPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12KT256MFU 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
MC9S12KT256CPVE 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12KG256CFUE 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
MC9S12KG256MFU 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
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