UPD77018A NEC, UPD77018A Datasheet - Page 19

• Manufacturer Part Number: UPD77018A
• Description: 16 bits/ Fixed-point Digital Signal Processor
• Manufacturer: NEC

2.3.6 CJC: Condition Judge Circuit
when the result is true, and not executed when the result is false.
2.4 Memory
words
separated.
Each addressing unit consists of four data pointers, four index registers, a modulo register and addressing ALU.
to DP7. After memory access, DPn (with the same subscript), can be modified by DNn value. Modulo operation
is performed with DMX for DP0 to DP3, with DMY for DP4 to DP7.
CJC judges whether condition is true or false with 40 bits input data. A conditional instruction is executed
The PD77018A has one instruction memory area (64K words
X memory area addresses are specified by DP0 to DP3, and Y memory area addresses are specified by DP4
The PD77018A has 2 sets of data addressing units, which are dedicated for addressing data memory area.
16 bits each). It adopts Harvard-type architecture, with instruction memory area and data memory areas
32 bits) and two data memory areas (64K
PD77018A, 77019
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