C8051F537-IM Silicon Laboratories Inc, C8051F537-IM Datasheet - Page 105

• Manufacturer Part Number: C8051F537-IM
• Description: IC 8051 MCU 2K FLASH 20QFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F53xr

Specifications of C8051F537-IM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.25 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-QFN
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.25 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 16 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 336-1400

SFR Definition 10.5. IT01CF: INT0/INT1 Configuration
Bit 7:
Bits 6–4: IN1SL2–0: INT0 Port Pin Selection Bits
Bit 3:
Bits 2–0: INT0SL2–0: INT0 Port Pin Selection Bits
Note: Refer to SFR Definition 18.1. “TCON: Timer Control” on page 185 for INT0/1 edge- or level-sensitive interrupt selection.
IN1PL
R/W
Bit7
IN1PL: INT0 Polarity
0: INT0 input is active low.
1: INT0 input is active high.
These bits select which Port pin is assigned to INT0. Note that this pin assignment is inde-
pendent 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).
IN0PL: INT0 Polarity
0: INT0 interrupt is active low.
1: INT0 interrupt is active high.
These bits select which Port pin is assigned to INT0. Note that this pin assignment is inde-
pendent 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).
Note: Available in the C80151F53x/C8051F53xA parts.
Note: Available in the C80151F53x/C8051F53xA parts.
IN1SL2
R/W
Bit6
IN1SL2-0
IN0SL2-0
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
IN1SL1
R/W
Bit5
IN1SL0
C8051F52x/F52xA/F53x/F53xA
R/W
Bit4
INT1 Port Pin
INT0 Port Pin
P0.6*
P0.7*
P0.6*
P0.7*
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
Rev. 1.3
IN0PL
R/W
Bit3
IN0SL2
R/W
Bit2
IN0SL1
R/W
Bit1
SFR Address:
IN0SL0
R/W
Bit0
00000001
Reset Value
0xE4
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