C508_01 Datasheet, PDF (9/267 Pages) Infineon Technologies AG – 8-Bit CMOS Microcontroller

C508
Introduction
1
Introduction
The C508 is a member of the Infineon Technologies C500 family of 8-bit
microcontrollers. It is fully compatible to the standard 8051 microcontroller. Its features
include extended power saving provisions, 256 × 8 on-chip RAM, 32K × 8 on-chip
program memory, RFI related improvements, and the Capture Compare Unit (CCU)
which is useful in motor control applications. The C508 has an internal PLL and, with a
maximum CPU clock rate of 20 MHz, it achieves a 300 ns instruction cycle time.
The C508 operates with internal and/or external program memory. The C508-4R
contains 32K × 8 on-chip program memory (ROM version) while the C508-4E has
32K × 8 One-Time Programmable program memory (OTP version). In this document,
the term C508 refers to both versions unless otherwise noted.
Figure 1-1 shows the various functional units of the C508 and Figure 1-2 shows the
simplified logic symbol of the C508.
Oscillator
Watchdog
10-Bit ADC
XRAM
1Kx8
XRAM
256 x 8
Port 0
Port 1
T0
Timer 2
16-Bit
Capture/Compare
Unit
T1
10-Bit
Compare Unit
Watchdog Timer
CPU
8 Datapointers
8-Bit
USART
Port 2
Port 3
ROM/OTP
32 K x 8
Port 4
Port 5
Figure 1-1 C508 Functional Units
I/O
I/O
I/O
I/O
8 Digital/Analog
Inputs
I/O
MCB04022
User’s Manual
1-1
2001-05