EZ80190AZ050SC00TR Zilog, EZ80190AZ050SC00TR Datasheet - Page 131

• Manufacturer Part Number: EZ80190AZ050SC00TR
• Description: IC EZ80 ACCLAIM 50MHZ 100LQFP
• Manufacturer: Zilog

Specifications of EZ80190AZ050SC00TR

• Processor Type: eZ80
• Features: High Speed, Single-Cycle Instruction-Fetch
• Speed: 50MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 59. State Progression of the MACC During Operation (Continued)
IN_SHIFT and OUT_SHIFT
PS006614-1208
DONE
DONE
DONE
DATA
Bank
Current State
IN_SHIFT Function
PROGRESS
PROGRESS
DONE
CALC
Bank
The Multiply-Accumulator on the eZ80190 device features two additional functions,
IN_SHIFT and OUT_SHIFT, that can be useful in many DSP operations. Both of these
optional functions are controlled by the MACC Control register, MACC_CTL.
The IN_SHIFT field, bits 2:0 of the MACC_CTL register, defines the magnitude of the
left-shift that is performed when the CPU writes a starting value to the MACC Accumula-
tor registers MACC_AC0, MACC_AC1, MACC_AC2, MACC_AC3, and MACC_AC4.
The MACC automatically handles the shift of the 40-bit value as it is written as a succes-
sion of 8-bit values. The writes can be left-shifted 0 to 7 bits depending upon the value of
IN_SHIFT. The NOISE field, bit 6 of the MACC_CTL register, sets the value used to fill
the lsbs vacated during the left-shift operation.
IN
IN
If the MACC completes execution of the current
calculation, the CALC bank status changes from
IN PROGRESS to DONE.
1. Read the result from the MACC Accumulator
2. Any read from MACC_AC4 produces the same
3. Any write to any MACC register except for
1. Read the result from the MACC Accumulator
2. Any read from MACC_AC4 produces the same
3. Any write to any MACC register except for
registers using the INI2R instruction. When the
INI2R instruction completes and the last read is
from any byte of MACC_ACx, the DATA bank
status changes from DONE to EMPTY.
effect.
MAC_STAT produces the same effect.
registers using the INI2R instruction. When the
INI2R instruction completes and the last read is
from any byte of MACC_ACx, the DATA bank
status changes from DONE to EMPTY.
effect.
MAC_STAT produces the same effect.
Operation
Product Specification
EMPTY
EMPTY
DONE
DATA
Bank
Next State
Multiply-Accumulator
PROGRESS
DONE
DONE
CALC
Bank
eZ80190
IN
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