參數(shù)資料
型號: μPD75P3018A
廠商: NEC Corp.
英文描述: 4 Bit Single Chip Microcontrollers(4位單片微控制器)
中文描述: 4位單片微控制器(4位單片微控制器)
文件頁數(shù): 16/60頁
文件大?。?/td> 337K
代理商: ΜPD75P3018A
μPD75P3018A
16
6. MEMORY CONFIGURATION
6.1
Program Counter (PC) ... 15 bits
This is a 15-bit binary counter that stores program memory address data.
Bit 15 is valid during Mk II mode. But PC14 is fixed at zero during Mk I mode, and the lower 14 bits are all valid.
Figure 6-1. Configuration of Program Counter
6.2
Program Memory (PROM) ... 32768 x 8 bits
The program memory consists of 32768 x 8-bit one-time PROM. The program memory address can be selected as shown
below by setting the stack bank selection (SBS) register.
Mk I mode
Mk II mode
Usable address
0000H to 3FFFH
0000H to 7FFFH
Figures 6-2 and 6-3 show the addressing ranges for the program memory and branch instruction and the subroutine call
instruction, during Mk I and Mk II modes.
PC14
PC13
PC12
PC11
PC10
PC9
PC8
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PC
Fixed at zero during
Mk I mode
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