PD17012_15 Datasheet, PDF (30/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
2.2 Program Memory
Figure 2-2 shows the configuration of the program memory.
As shown in this figure, the program memory has a configuration of 4,096 steps × 16 bits.
Therefore, program memory addresses are addresses 0000H to 0FFFH.
All instructions are 1-word instructions, 16 bits long, so that one instruction can be stored in one address of
the program memory.
The constant data in the program memory contents is read to the data buffer by using a table reference
instruction.
Figure 2-2. Configuration of Program Memory
0000H
16 bits
07FFH
0800H
4K
2K
0FFFH
Page 0
Page 1
2.3 Program Counter
Figure 2-3 shows the configuration of the program counter.
As shown in this figure, the program counter is configured as a 12-bit binary counter. The most significant
bit, b11, indicates a page.
The program counter specifies an address of the program memory.
Figure 2-3. Configuration of Program Counter
PC11
PC10
PC9
PC8
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Page
PC
28
Data Sheet U10101EJ4V0DS