C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 141

• Manufacturer Part Number: C8051F321
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F321

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Bits7-0:
Bits7-1:
Bit0:
P3.7
R/W
R/W
Bit7
Bit7
P3.[7:0]
Write - Output appears on I/O pins.
0: Logic Low Output.
1: Logic High Output (high impedance if corresponding P3MDOUT.n bit = 0).
Read - Always reads ‘0’ if selected as analog input in register P3MDIN. Directly reads Port pin when
configured as digital input.
0: P3.n pin is logic low.
1: P3.n pin is logic high.
UNUSED. Read = 0000000b; Write = don’t care.
Analog Input Configuration Bit for P3.0.
Port pins configured as analog inputs have their weak pull-up, digital driver, and digital receiver dis-
abled.
0: Corresponding P3.n pin is configured as an analog input.
1: Corresponding P3.n pin is not configured as an analog input.
P3.6
R/W
R/W
Bit6
Bit6
Figure 14.20. P3MDIN: Port3 Input Mode Register
P3.5
R/W
R/W
Bit5
Bit5
Figure 14.19. P3: Port3 Register
P3.4
R/W
R/W
Bit4
Bit4
P3.3
R/W
R/W
Bit3
Bit3
Rev. 1.1
P3.2
R/W
R/W
Bit2
Bit2
P3.1
R/W
R/W
Bit1
Bit1
C8051F320/1
(bit addressable)
P3.0
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
00000001
Reset Value
Reset Value
11111111
0xB0
0xF4
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