UPD17016 Datasheet, PDF (26/324 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17016, 17017
2.3 Program Counter
Figure 2-3 shows the configuration of the program counter.
The program counter specifies an address of the program memory.
Bit PC11 of the µPD17016, and PC11 and PC12 of the µPD17017 indicate a page.
Figure 2-3. Configuration of Program Counter
PC12
PC11
PC10
PC9
PC8
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Page
PC ( µPD17016)
Page
PC ( µPD17017)
2.4 Program Flow
The execution flow of the program is controlled by the program counter which specifies an address of the
program memory.
Figure 2-4 shows the value set to the program counter when each instruction is executed.
Table 2-1 shows a vector address when an interrupt is acknowledged.
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