SYNPWM datasheet(9/57 Pages) FEELING

tên linh kiện	SYNPWM

Giải thích chi tiết về linh kiện	EPROM-Based 8-Bit Microcontroller with 10 bit ADC

PDF	57 Pages

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FM8P73B

Web site: http://www.feeling-tech.com.tw

Rev1.0 Nov 20, 2013

P.9/FM8P73B

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2.1.2

PCL (Low Bytes of Program Counter) & Stack

Address

Name

02h (r/w)

PCL

Low order 8 bits of PC

FM8P73B device have a 10-bits wide Program Counter (PC) and six-level deep 10-bit hardware push/pop stack.

The low byte of PC is called the PCL register. This register is readable and writable.

As a program instruction is executed, the Program Counter will contain the address of the next program

instruction to be executed. The PC value is increased by one, every instruction cycle, unless an instruction

changes the PC.

Figure 2.2: Loading of PC in Different Situations

Situation 1: GOTO Instruction

PCL

Opcode <9:0>

PCH

Situation 2: CALL Instruction

PCL

Opcode <9:0>

PCH

STACK<9:0>

Situation 3: RETIA, RETFIE, or RETURN Instruction

PCL

PCH

STACK<9:0>

Situation 4: Instruction with PCL as destination

PCL

STATUS

PCH

ALU result <7:0>

Or Opcode <7:0>

Note: PC<9:8> cannot be accessed.

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