C8051F523A-IM Silicon Laboratories Inc, C8051F523A-IM Datasheet - Page 73

• Manufacturer Part Number: C8051F523A-IM
• Description: IC 8051 MCU 4K FLASH 10DFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F52xr

Specifications of C8051F523A-IM

• Program Memory Type: FLASH
• Program Memory Size: 4KB (4K x 8)
• Package / Case: 10-DFN
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 6
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.25 V
• Data Converters: A/D 6x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Processor Series: C8051F5x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 3
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F500DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 12-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1488 - KIT DEV C8051F53XA, C8051F52XA770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1455 - ADAPTER PROGRAM TOOLSTICK F520
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1491-5

Important Note About the V
the internal V
should be configured as an analog pin, and skipped by the Digital Crossbar. To configure P0.0 as an ana-
log pin, clear Bit 0 in register P0MDIN to 0. To configure the Crossbar to skip P0.0, set Bit 0 in register
P0SKIP to 1. Refer to Section “13. Port Input/Output” on page 119 for complete Port I/O configuration
details.
The TEMPE bit in register REF0CN enables/disables the temperature sensor. While disabled, the temper-
ature sensor defaults to a high impedance state and any ADC0 measurements performed on the sensor
result in meaningless data.
SFR Definition 5.1. REF0CN: Reference Control
Bits7–6: RESERVED. Read = 00b. Must write 00b.
Bit5:
Bit4:
Bit3:
Bit2:
Bit1:
Bit0:
Reserved Reserved
R/W
Bit7
ZTCEN: Zero-TempCo Bias Enable Bit.
This bit must be set to 1b before entering oscillator suspend mode.
0: ZeroTC Bias Generator automatically enabled when needed.
1: ZeroTC Bias Generator forced on.
REFLV: Voltage Reference Output Level Select.
This bit selects the output voltage level for the internal voltage reference.
0: Internal voltage reference set to 1.5 V.
1: Internal voltage reference set to 2.2 V.
REFSL: Voltage Reference Select.
This bit selects the source for the internal voltage reference.
0: V
1: V
TEMPE: Temperature Sensor Enable Bit.
0: Internal Temperature Sensor off.
1: Internal Temperature Sensor on.
BIASE: Internal Analog Bias Generator Enable Bit.
0: Internal Analog Bias Generator automatically enabled when needed.
1: Internal Analog Bias Generator on.
REFBE: Internal Reference Buffer Enable Bit.
0: Internal Reference Buffer disabled.
1: Internal Reference Buffer enabled. Internal voltage reference driven on the V
REF
REF
DD
. When using either an external voltage reference or the internal reference circuitry, P0.0
R/W
Bit6
used as voltage reference.
pin used as voltage reference.
ZTCEN
R/W
Bit5
REF
Pin: Port pin P0.0 is used as the external V
REFLV
R/W
Bit4
C8051F52x/F52xA/F53x/F53xA
Rev. 1.3
REFSL
R/W
Bit3
TEMPE
R/W
Bit2
BIASE
R/W
Bit1
REF
input and as an output for
REFBE
R/W
Bit0
REF
SFR Address:
00000000
Reset Value
pin.
0xD1
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