C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 95

• 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: -

Bit7:
Bits6-4:
Bit3:
Bits2-0:
Note: Refer to Figure 19.4 for INT0/1 edge- or level-sensitive interrupt selection.
IN1PL
R/W
Bit7
IN1PL: /INT1 Polarity
0: /INT1 input is active low.
1: /INT1 input is active high.
IN1SL2-0: /INT1 Port Pin Selection Bits
These bits select which Port pin is assigned to /INT1. Note that this pin assignment is independent of
the Crossbar; /INT1 will monitor the assigned Port pin without disturbing the peripheral that has been
assigned the Port pin via the Crossbar. The Crossbar will not assign the Port pin to a peripheral if it is
configured to skip the selected pin (accomplished by setting to ‘1’ the corresponding bit in register
P0SKIP).
IN0PL: /INT0 Polarity
0: /INT0 interrupt is active low.
1: /INT0 interrupt is active high.
INT0SL2-0: /INT0 Port Pin Selection Bits
These bits select which Port pin is assigned to /INT0. Note that this pin assignment is independent of
the Crossbar. /INT0 will monitor the assigned Port pin without disturbing the peripheral that has been
assigned the Port pin via the Crossbar. The Crossbar will not assign the Port pin to a peripheral if it is
configured to skip the selected pin (accomplished by setting to ‘1’ the corresponding bit in register
P0SKIP).
IN1SL2-0
IN0SL2-0
IN1SL2
R/W
Bit6
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
Figure 9.15. IT01CF: INT0/INT1 Configuration Register
IN1SL1
R/W
Bit5
/INT1 Port Pin
/INT0 Port Pin
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
IN1SL0
R/W
Bit4
IN0PL
R/W
Bit3
Rev. 1.1
IN0SL2
R/W
Bit2
IN0SL1
R/W
Bit1
C8051F320/1
IN0SL0
R/W
Bit0
SFR Address:
00000001
Reset Value
0xE4
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