MMC2114 MOTOROLA [Motorola, Inc], MMC2114 Datasheet - Page 557

• Manufacturer Part Number: MMC2114
• Description: M CORE Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

21.8 Interrupts
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
NOTE:
When no chip select pin is available, the active chip select can still
terminate the bus cycle. If both the CSEN and TAEN bits are 1 and the
address/options match the chip select configuration, then the chip select
logic asserts the internal termination signal; the bus cycle terminates
after the programmed number of wait states. If the external TA or TEA
pin is asserted before the chip select logic asserts the internal cycle
termination signal, then the bus cycle is terminated early.
If internal address bit 31 is 0, then the access is internal. If internal
address bit 31 is 1, then the access is external.
Chip select logic does not decode internal address bits A[30:25].
The chip select module does not generate interrupt requests.
Chip Select Block Size
1. The chip selects do not decode A[30:25]. Thus, the total 32-Mbyte block size is repeat-
2. If the EMINT bit in the chip configuration module CCR is set, then CS1 matches only inter-
Freescale Semiconductor, Inc.
ed/mirrored in external memory space.
nal accesses to the 8-MB block starting at address 0 to support emulation of internal mem-
ory. Thus, A[31:23] match 0xxx_xxx0_0.
CS0
CS1
CS2
CS3
For More Information On This Product,
Table 21-4. Chip Select Address Range Encoding
Go to: www.freescale.com
8 MB
8 MB
8 MB
8 MB
Chip Select Module
0x8000_0000–0x807f_ffff
0x8100_0000–0x817f_ffff
0x8080_0000–0x80ff_ffff
0x8180_0000–0x81ff_ffff
Address Range
Address Bits Compared
1xxx_xxx0_1
1xxx_xxx0_0
1xxx_xxx1_0
1xxx_xxx1_1
(A[31:23])
Advance Information
Chip Select Module
(1)
Interrupts
(2)
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