SC73P1601

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.4

2009.08.03

Http: www.silan.com.cn

Page 5 of 22

Program time sequence:

Performance Characteristics

Symbol

Condition

Min.

Typ.

Max.

Unit

Setup time of “Oeb”

1

-

-

s

Setup time of “Ceb”

1

-

-

s

Setup time of “D[8:0]”

1

-

-

s

Hold time of “Ceb”

1

-

-

s

Hold time of “D[8:0]”

1

-

-

s

1

-

-

s

1

-

-

s

Pulse width of “Progb”

200

300

-

s

FUNCTION DESCRIPTION

SC73P1601 includes 4-bit MCU, outlay oscillator, system reset module. Next we will mainly introduce the

functions.

1. PC

PC refers to the program address pointer, 10 bits. The maximum addressing space is 1K ROM .The program

counter contains the address of the instruction that will be executed next. The PC value is cleared to 0 after reset.

The PC is set to predefined value when one of the 3 following occasions occurs: 1) when the JUMP instruction is

executed; 2) when a subroutine call is back; 3) when a program call is back. In the SC73P1601, all instructions

are one-byte instructions, PC increments by 1 each time an instruction is executed.