參數(shù)資料
型號(hào): UPD17232MC
廠商: NEC Corp.
元件分類(lèi): 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機(jī)的小型通用紅外遙控器
文件頁(yè)數(shù): 12/92頁(yè)
文件大?。?/td> 378K
代理商: UPD17232MC
Data Sheet U14360EJ1V0DS00
μ
PD17230, 17231, 17232, 17233, 17234, 17235, 17236
12
2.
MEMORY SPACE
2.1
Program Counter (PC)
The program counter (PC) specifies an address of the program memory (ROM).
The program counter is an 11/12/13-bit binary counter and a 1-bit segment counter (SGR) as shown in Figure
2-1.
Its contents are initialized to address 0000H at reset.
Figure 2-1. Configuration of Program Counter
2.1.1
Segment register (SGR)
The segment register specifies a segment of the program memory.
Table 2-1 shows the relation between the segment register and program memory.
Table 2-1. Relation between Segment Register and Program Memory
Value of Segment Register
Segment of Program Memory
0
Segment 0
1
Segment 1
The segment register is set when the following instructions are executed:
BR @AR
CALL @AR
SYSCAL entry
Page
PC ( PD17230)
MSB
LSB
SGR
PC
12
PC
11
PC
10
PC
9
PC
8
PC
7
PC
6
PC
5
PC
4
PC
3
PC
2
PC
1
PC
0
PC ( PD17231)
PC ( PD17232, 17233)
PC ( PD17234, 17235, 17236)
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