C8051F331 Silicon Laboratories Inc, C8051F331 Datasheet - Page 65

• Manufacturer Part Number: C8051F331
• Description: IC 8051 MCU 8K FLASH 20MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F33xr

Specifications of C8051F331

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

9.
The MCU system controller core is the CIP-51 microcontroller. The CIP-51 is fully compatible with the
MCS-51™ instruction set; standard 803x/805x assemblers and compilers can be used to develop soft-
ware. The MCU family has a superset of all the peripherals included with a standard 8051. Included are
four 16-bit counter/timers (see description in
in
Special Function Register (SFR) address space
tion
directly with the analog and digital subsystems providing a complete data acquisition or control-system
solution in a single integrated circuit.
The CIP-51 Microcontroller core implements the standard 8051 organization and peripherals as well as
additional custom peripherals and functions to extend its capability (see Figure 9.1 for a block diagram).
The CIP-51 includes the following features:
-
-
-
-
-
Performance
The CIP-51 employs a pipelined architecture that greatly increases its instruction throughput over the stan-
dard 8051 architecture. In a standard 8051, all instructions except for MUL and DIV take 12 or 24 system
clock cycles to execute, and usually have a maximum system clock of 12 MHz. By contrast, the CIP-51
core executes 70% of its instructions in one or two system clock cycles, with no instructions taking more
than eight system clock cycles.
Section
Fully Compatible with MCS-51 Instruction Set
25 MIPS Peak Throughput with 25 MHz Clock
0 to 25 MHz Clock Frequency
256 Bytes of Internal RAM
17 Port I/O
14). The CIP-51 also includes on-chip debug hardware (see description in
CIP-51 Microcontroller
16), an Enhanced SPI (see description in
RESET
CLOCK
STOP
IDLE
ACCUMULATOR
Figure 9.1. CIP-51 Block Diagram
PROGRAM COUNTER (PC)
CONTROL
PSW
PRGM. ADDRESS REG.
LOGIC
POWER CONTROL
PC INCREMENTER
DATA POINTER
REGISTER
BUFFER
TMP1
PIPELINE
Section
ALU
(Section
C8051F330/1, C8051F330D
Rev. 1.2
TMP2
DATA BUS
DATA BUS
D8
D8
D8
18), an enhanced full-duplex UART (see description
-
-
-
-
-
Section
A16
D8
D8
D8
D8
B REGISTER
9.2.6), and 17 Port I/O (see description in
REGISTER
INTERFACE
INTERFACE
INTERRUPT
INTERFACE
Extended Interrupt Handler
Reset Input
Power Management Modes
On-chip Debug Logic
Program and Data Memory Security
ADDRESS
MEMORY
SRAM
SFR
BUS
17), 256 bytes of internal RAM, 128 byte
MEM_WRITE_DATA
SFR_WRITE_DATA
MEM_READ_DATA
STACK POINTER
(256 X 8)
SFR_READ_DATA
SRAM
MEM_CONTROL
EMULATION_IRQ
MEM_ADDRESS
SFR_CONTROL
SFR_ADDRESS
SYSTEM_IRQs
Section
20), and interfaces
Sec-
65