mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 302

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Interrupt Controller (CF1_INTC)
13.3.5
The INTC_CFRC register provides a simple memory-mapped mechanism to clear a given bit in the
INTC_FRC register to negate a specific level interrupt request. The data value on the register write causes
the appropriate bit in the INTC_FRC register to be cleared. Attempted reads of this register generate an
error termination.
This register is provided so interrupt service routines can negate a forced interrupt request without the need
to perform a read-modify-write sequence on the INTC_FRC register.
13-12
Offset: CF1_INTC_BASE + 0x1F (INTC_CFRC)
Field
Field
SET
Reset
CLR
7–6
5–0
7–6
5–0
W
R
Reserved, must be cleared.
For data values within the 32–38 range, the corresponding bit in the INTC_FRC register is set, as defined below.
0x20 Bit 32, INTC_FRC[LVL7] is set
0x21 Bit 33, INTC_FRC[LVL6] is set
0x22 Bit 34, INTC_FRC[LVL5] is set
0x23 Bit 35, INTC_FRC[LVL4] is set
0x24 Bit 36, INTC_FRC[LVL3] is set
0x25 Bit 37, INTC_FRC[LVL2] is set
0x26 Bit 38, INTC_FRC[LVL1] is set
Note: Data values outside this range do not affect the INTC_FRC register. It is recommended the data values be
Reserved, must be cleared.
For data values within the 32–38 range, the corresponding bit in the INTC_FRC register is cleared, as defined below.
0x20 Bit 32, INTC_FRC[LVL7] is cleared
0x21 Bit 33, INTC_FRC[LVL6] is cleared
0x22 Bit 34, INTC_FRC[LVL5] is cleared
0x23 Bit 35, INTC_FRC[LVL4] is cleared
0x24 Bit 36, INTC_FRC[LVL3] is cleared
0x25 Bit 37, INTC_FRC[LVL2] is cleared
0x26 Bit 38, INTC_FRC[LVL1] is cleared
Note: Data values outside this range do not affect the INTC_FRC register. It is recommended the data values be
INTC Clear Interrupt Force Register (INTC_CFRC)
0
0
7
restricted to the 0x20–0x26 (32–38) range to ensure compatibility with future devices.
restricted to the 0x20–0x26 (32–38) range to ensure compatibility with future devices.
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
0
0
6
Table 13-8. INTC_CFRC Field Descriptions
Table 13-7. INTC_SFRC Field Descriptions
Figure 13-6. INTC_CFRC Register
0
5
0
4
Description
Description
3
0
CLR
0
2
Freescale Semiconductor
0
1
Access: Write-only
0
0