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ADDENDUM TO
MC68340 Integrated Processor With DMA User's
Manual - Rev 1
MC68340
MOTOROLA, 1994
Microprocessor and Memory
Technologies Group
SEMICONDUCTOR PRODUCT INFORMATION
December 8, 1994
General - AESOP Bulletin Board
Latest information on this product is maintained on the AESOP BBS at (800)843-3451 (US and Canada) or
(512)891-3650. Configure modem up to 14.4K baud, 8 bits, 1 stop bit, and no parity. Terminal should support
VT100 emulation.
1. Operand Alignment
On page 3-7, third paragraph (under 3.2.2), change the first two lines to: "The CPU32 restricts all operands (both
data and instructions) to be word-aligned. That is, word and long-word operands must be located on a word
boundary." Long-word operands do not have to be long-word aligned.
2. Additional Note on MBAR Decode
Add to the CPU Space Cycles description on page 3-21: The CPU space decode logic allocates the 256-
byte block from $3FF00-3FFFF to the SIM module. An internal 2-clock termination is provided by this initial
decode for any access to this range, but selection of specific registers depends on additional decode.
Accesses to the MBAR register at long word $3FF00 are internal only, and are only visible by enabling show
cycles. Users should directly access only the MBAR register, and use the LPSTOP instruction to generate the
LPSTOP broadcast access to $3FFFE. The remaining address range $3FF04-3FFFD is Motorola reserved
and should not be accessed.
3. Additional Notes on CPU Space Address Encoding
On page 3-21, Figure 3-10, the BKPT field for the Breakpoint Acknowledge address encoding is on bits 4-2, and
the T bit is on bit 1. The Interrupt Acknowledge LEVEL field is on bits 3-1.
4. Breakpoints
On page 3-22, the first paragraph implies that either a software breakpoint (BKPT instruction) or hardware
breakpoint can be used to insert an instruction. As noted in the following paragraphs, only a software breakpoint
can be used to insert an instruction on the breakpoint acknowledge cycle.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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