C508 datasheet(5/93 Pages) INFINEON

5 / 93 page

Data Sheet

2000-08

C508

8-Bit CMOS Microcontroller

C500 Family

C508

• Fully compatible to standard 8051 microcontroller

• Superset of the 8051 architecture with 8 datapointers

• 10 to 20 MHz internal CPU clock (using built-in PLL with a factor of 2)

– external clock of 5 - 10 MHz at 50% duty cycle

– 300 ns instruction cycle time at 20 MHz CPU clock

• 32 Kbyte on-chip ROM/OTP (with optional ROM protection)

• 256 byte on-chip RAM

• 1024 byte on-chip XRAM

• Six 8-bit ports

– Ports 1 and 2 with enhanced current sinking capabilities of 10 mA

(total max. of 100 mA)

– Port 4 with pure analog/digital input channels

Further features are listed next page.

Figure 1

C508 Functional Units

MCB04022

I/O

Watchdog Timer

Timer 2

10-Bit ADC

Oscillator

Watchdog

XRAM

1 K x 8

XRAM

256 x 8

ROM/OTP

32 K x 8

Port 3

Port 2

Port 1

Port 0

8-Bit

USART

CPU

8 Datapointers

Port 5

Port 4

8 Digital/Analog

Inputs

I/O

10-Bit

Compare Unit

16-Bit

Capture/Compare

Unit

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