C8051F312 Silicon Laboratories Inc, C8051F312 Datasheet - Page 29

• Manufacturer Part Number: C8051F312
• Description: IC 8051 MCU 8K FLASH 32LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F31xr

Specifications of C8051F312

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 29
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 21x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1151

1.2.
The CIP-51 has a standard 8051 program and data address configuration. It includes 256 bytes of data
RAM, with the upper 128 bytes dual-mapped. Indirect addressing accesses the upper 128 bytes of general
purpose RAM, and direct addressing accesses the 128 byte SFR address space. The lower 128 bytes of
RAM are accessible via direct and indirect addressing. The first 32 bytes are addressable as four banks of
general purpose registers, and the next 16 bytes can be byte addressable or bit addressable.
Program memory consists of 8 or 16 kB of Flash. This memory may be reprogrammed in-system in 512
byte sectors, and requires no special off-chip programming voltage. See Figure 1.11 for the MCU system
memory map.
0x3DFF
0x1FFF
0x3E00
0x0000
0x2000
0x0000
On-Chip Memory
PROGRAM/DATA MEMORY
Programmable in 512
Programmable in 512
C8051F312/3/4/5
C8051F310/1/6/7
Byte Sectors)
Byte Sectors)
RESERVED
RESERVED
16 kB Flash
(In-System
(In-System
8 kB Flash
(Flash)
Figure 1.11. On-Board Memory Map
0xFFFF
0x03FF
0x0400
0x0000
0xFF
0x80
0x7F
0x30
0x2F
0x20
0x1F
0x00
Rev. 1.7
XRAM - 1024 Bytes
0x0000 to 0x03FF, wrapped
(accessable using MOVX
Same 1024 bytes as from
(Indirect Addressing
(Direct and Indirect
C8051F310/1/2/3/4/5/6/7
EXTERNAL DATA ADDRESS SPACE
INTERNAL DATA ADDRESS SPACE
General Purpose
Upper 128 RAM
on 1 kB boundaries
Bit Addressable
Addressing)
instruction)
Registers
Only)
DATA MEMORY (RAM)
(Direct Addressing Only)
Special Function
Lower 128 RAM
(Direct and Indirect
Addressing)
Register's
29