mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 1243

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

49.3
This section provides a detailed description of the IRQ register that is accessible to the
end user.
49.3.1 Interrupt status and control register (IRQ_SC)
Address: IRQ_SC is FFFF_80A0h base + 0h offset = FFFF_80A0h
Freescale Semiconductor, Inc.
FFFF_80A0
Absolute
address
Reserved
(hex)
IRQEDG
IRQPDD
IRQPE
Reset
Field
Read
Write
7
6
5
4
Bit
Memory Map and Register Description
Interrupt status and control register (IRQ_SC)
This read-only bit is reserved and always has the value zero.
IRQ pull device disable
Use this bit to disable the on-chip pullup/pulldown device on the IRQ pin. This allows users to have an
external device if required for their application.
0
1
IRQ edge select
This bit selects the falling edge/low level or rising edge/high level function of the IRQ pin.
0
1
IRQ pin enable
This bit determines whether the IRQ pin is enabled.
7
0
0
On-chip pullup/pulldown device is enabled
On-chip pullup/pulldown device is disabled
Falling edge/low level
Rising edge/high level
IRQPDD
0
6
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Register name
IRQEDG
IRQ_SC field descriptions
Table continues on the next page...
0
5
IRQ memory map
Preliminary
IRQPE
0
4
Description
IRQF
0
3
(in bits)
Width
8
IRQACK
Access
Chapter 49 External Interrupt (IRQ)
R/W
0
0
2
Reset value
IRQIE
00h
0
1
IRQMOD
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49.3.1/
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