EZ80190AZ050EC00TR Zilog, EZ80190AZ050EC00TR Datasheet - Page 132
EZ80190AZ050EC00TR
Manufacturer Part Number
EZ80190AZ050EC00TR
Description
IC EZ80 ACCLAIM 50MHZ 100LQFP
Manufacturer
Zilog
Datasheet
1.EZ80190AZ050SG.pdf
(221 pages)
Specifications of EZ80190AZ050EC00TR
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
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PS006614-1208
Example 1—
not shifted. If the MACC Accumulator is loaded with a 40-bit value using a succession of
8-bit writes, the procedure appears as follows:
1. Write the LSB to the MACC Accumulator
2. Write the second byte to the MACC Accumulator
3. Write the third byte to the MACC Accumulator
4. Write the fourth byte to the MACC Accumulator
5. Write the MSB to the MACC Accumulator
Example 2—
registers are left-shifted by 3 bits. The 3 lsbs are filled with a NOISE value of 1. If the
MACC Accumulator is loaded with a 40-bit value using a succession of 8-bit writes, the
procedure appears as follows:
1. Write the LSB to the MACC Accumulator
2. Write the second byte to the MACC Accumulator
3. Write the third byte to the MACC Accumulator
4. Write the fourth byte to the MACC Accumulator
5. Write the MSB to the MACC Accumulator
In Example 2, notice that the upper 3 bits of the final write are ignored.
MACC Accumulator [7:0] = MACC_AC0[7:0] = DATA_IN[7:0]
MACC Accumulator [15:8] = MACC_AC1[7:0] = DATA_IN[7:0]
MACC Accumulator [23:16] = MACC_AC2[7:0] = DATA_IN[7:0]
MACC Accumulator [31:24] = MACC_AC3[7:0] = DATA_IN[7:0]
MACC Accumulator [39:32] = MACC_AC4[7:0] = DATA_IN[7:0]
MACC Accumulator [10:0] = {MACC_AC0[7:0], 111b} = {DATA_IN[7:0], 111b}
MACC Accumulator [18:11] = MACC_AC1[7:0] = DATA_IN[7:0]
MACC Accumulator [26:19] = MACC_AC2[7:0] = DATA_IN[7:0]
MACC Accumulator [34:27] = MACC_AC3[7:0] = DATA_IN[7:0]
MACC Accumulator [39:35] = MACC_AC4[4:0] = DATA_IN[4:0]
When IN_SHIFT =
When IN_SHIFT =
011b
000b
, writes to the MACC Accumulator registers are
and NOISE = 1, writes to the MACC Accumulator
Product Specification
Multiply-Accumulator
eZ80190
122
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