C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 61

• 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: -

Bits7-6:
Bits5-4:
Bits3-2:
Bits1-0:
R/W
Bit7
-
UNUSED. Read = 00b, Write = don’t care.
CMX0N1-CMX0N0: Comparator0 Negative Input MUX Select.
These bits select which Port pin is used as the Comparator0 negative input.
UNUSED. Read = 00b, Write = don’t care.
CMX0P1-CMX0P0: Comparator0 Positive Input MUX Select.
These bits select which Port pin is used as the Comparator0 positive input.
†
devices.
CMX0N1 CMX0N0
CMX0P1 CMX0P0
Note: P2.4 and P2.5 available only on C8051F320 devices; selection reserved on C8051F321
0
0
1
1
0
0
1
1
R/W
Bit6
Figure 7.5. CPT0MX: Comparator0 MUX Selection Register
-
CMX0N1 CMX0N0
0
1
0
1
0
1
0
1
R/W
Bit5
Negative Input
Positive Input
R/W
Bit4
P2.5
P2.4
P1.1
P1.5
P2.1
P1.0
P1.4
P2.0
†
†
R/W
Bit3
-
Rev. 1.1
R/W
Bit2
-
CMX0P1
R/W
Bit1
C8051F320/1
CMX0P0
R/W
Bit0
SFR Address:
00000000
Reset Value
0x9F
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