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Introduction

C501

Semiconductor Group 1-1

1 Introduction

The C501-L, C501-1R, and C501-1E described in this document are compatible (also pin-

compatible) with the 80C52 and can be used in typical 80C52 applications.

The C501-1R contains a non-volatile 8K×8 read-only program memory, a volatile 256×8 read/write

data memory, four ports, three 16-bit timers/counters, a seven source, two priority level interrupt

structure and a serial port. The C501-L is identical, except that it lacks the program memory on

chip. The C501-1E contains a one-time programmable (OTP) program memory on chip. The term

C501 refers to all versions within this specification unless otherwise noted.

Figure 1-1

C501G Functional Units

MCA03238

Port 0

Port 1

Port 2

Port 3

RAM

256 x 8

CPU

USART

Power

Saving

8K x 8 OTP (C501-1E)

Modes

8K x 8 ROM (C501-1R)

1 2 3 4 5 6 7 8 9 10 11 12 ... 120 121

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Siemens EF 88H Series Manual de usuario Pagina 7