ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 131

• Manufacturer Part Number: ez80190
• Description: Ez80190 Microprocessor
• Manufacturer: ZiLOG Semiconductor

PS006613-0306
EMPTY
EMPTY
EMPTY
EMPTY
READY
DATA
Bank
Current State
PROGRESS
PROGRESS
PROGRESS
Table 59. State Progression of the MACC During Operation (Continued)
DONE
DONE
CALC
Bank
IN
IN
IN
Operation
1. Define a new calculation by loading the MACC
2. Any write to MACC_AC4 produces the same
If the MACC completes execution of the current
calculation, the CALC bank status changes from
IN PROGRESS to DONE.
Write a value of 80h to the MACC_STAT register
to force a swap of the CALC and DATA banks.
The CALC bank status is now EMPTY. The DATA
bank status changes to DONE indicating that it
now holds the result from the most recent MACC
calculation.
1. Define a new calculation by loading the MACC
2. Any write to MACC_AC4 produces the same
When the MACC completes execution of the
current calculation, the banks swap. The DATA
bank status changes to DONE to indicate the
availability of the just completed calculation. The
MACC begins the new calculation so the CALC
bank status remains IN PROGRESS.
control registers using the OTI2R instruction.
When the OTI2R instruction completes and the
last write is to either MACC_CTL or any byte of
MACC_ACx, the DATA bank state changes from
EMPTY to READY. This change in status
indicates the DATA bank contains a new
calculation that is ready to execute as soon as
the MACC completes its current calculation.
effect.
control registers using the OTI2R instruction.
When the OTI2R instruction completes and the
last write is to either MACC_CTL or any byte of
MACC_ACx, the banks swap and a new
calculation begins. The CALC bank status
changes from DONE to IN PROGRESS as it
begins the new calculation. The DATA bank
status changes from EMPTY to DONE as it now
contains the result of the previous calculation.
effect.
PRELIMINARY
eZ80190 Product Specification
READY
EMPTY
DONE
DONE
DONE
DATA
Bank
Next State
Multiply-Accumulator
PROGRESS
PROGRESS
PROGRESS
EMPTY
DONE
CALC
Bank
IN
IN
IN
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