C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 137

• 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:
Bits7-0:
P1.7
R/W
R/W
Bit7
Bit7
P1.[7:0]
Write - Output appears on I/O pins per Crossbar Registers (when XBARE = ‘1’).
0: Logic Low Output.
1: Logic High Output (high impedance if corresponding P1MDOUT.n bit = 0).
Read - Always reads ‘0’ if selected as analog input in register P1MDIN. Directly reads Port pin when
configured as digital input.
0: P1.n pin is logic low.
1: P1.n pin is logic high.
Analog Input Configuration Bits for P1.7-P1.0 (respectively).
Port pins configured as analog inputs have their weak pull-up, digital driver, and digital receiver dis-
abled.
0: Corresponding P1.n pin is configured as an analog input.
1: Corresponding P1.n pin is not configured as an analog input.
P1.6
R/W
R/W
Bit6
Bit6
Figure 14.12. P1MDIN: Port1 Input Mode Register
P1.5
R/W
R/W
Bit5
Bit5
Figure 14.11. P1: Port1 Register
P1.4
R/W
R/W
Bit4
Bit4
P1.3
R/W
R/W
Bit3
Bit3
Rev. 1.1
P1.2
R/W
R/W
Bit2
Bit2
P1.1
R/W
R/W
Bit1
Bit1
C8051F320/1
(bit addressable)
P1.0
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
Reset Value
Reset Value
11111111
11111111
0xF2
0x90
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