EZ80190AZ050SC00TR Zilog, EZ80190AZ050SC00TR Datasheet - Page 132

• 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

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