Cirrus Logic CRD5378 - Manual (Page 22)

CRD5378
22 DS639RD2
2.3.2 Microcontroller
Included on CRD5378 is an 8051-type microcontroller with integrated hardware SPI and USB interfaces.
This C8051F320 microcontroller is a product of Silicon Laboratories (
http://www.silabs.com ). Key features
of the C8051F320 microcontroller are:
• 8051 compatibility - uses industry standard 8051 software development tools
• In-circuit debugger - software development on the target hardware
• Internal memory - 16k flash ROM and 2k static RAM included on-chip
• Multiple serial connections - SPI, USB, I
2
C, and UART
• High performance - 25 MIPS maximum
• Low power - 0.6 mA @ 1 MHz w/o USB, 9 mA @ 12 MHz with USB
• Small size - 32 pin LQFP package, 9mm x 9mm
• Industrial temperature - full performance (including USB) from -40 C to +85 C
• Internal temperature sensor - with range violation interrupt capability
• Internal timers - four general purpose plus one extended capability
• Power on reset - can supply a reset signal to external devices
• Analog ADC - 10 bit, 200 ksps SAR with internal voltage reference
• Analog comparators - arbitrary high/low voltage compare with interrupt capability
The exact use of the microcontroller features is controlled by embedded firmware.
C8051F320 has dedicated pins for power and the USB connection, plus 25 general purpose I/O pins that
connect to the various internal resources through a programmable crossbar. Hardware connections on
CRD5378 limit how the blocks can operate, so the port mapping of microcontroller resources is detailed
below.