C8051F502-IMR Silicon Laboratories Inc, C8051F502-IMR Datasheet - Page 74

• Manufacturer Part Number: C8051F502-IMR
• Description: MCU 8-Bit C8051F50x 8051 CISC 64KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F502-IMR

• Package: 32QFN EP
• Device Core: 8051
• Family Name: C8051F50x
• Maximum Speed: 50 MHz
• Ram Size: 4.25 KB
• Program Memory Size: 64 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 25
• Interface Type: I2C/SPI/UART
• On-chip Adc: 32-chx12-bit
• Operating Temperature: -40 to 125 °C
• Number Of Timers: 4

C8051F50x/F51x
SFR Definition 8.1. REF0CN: Reference Control
SFR Address = 0xD1; SFR Page = 0x00
74
Name
Reset
7:6
Bit
Type
5
4
3
2
1
0
Bit
Unused
TEMPE
ZTCEN
REFBE
REFSL
REFLV
BIASE
Name
R
7
0
Read = 00b; Write = don’t care.
Zero Temperature Coefficient Bias Enable Bit.
This bit must be set to 1b before entering oscillator suspend mode.
0: ZeroTC Bias Generator automatically enabled when required.
1: ZeroTC Bias Generator forced on.
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 2.20 V.
Voltage Reference Select.
This bit selects the ADCs voltage reference.
0: V
1: V
Temperature Sensor Enable Bit.
0: Internal Temperature Sensor off.
1: Internal Temperature Sensor on.
Internal Analog Bias Generator Enable Bit.
0: Internal Bias Generator off.
1: Internal Bias Generator on.
On-chip Reference Buffer Enable Bit.
0: On-chip Reference Buffer off.
1: On-chip Reference Buffer on. Internal voltage reference driven on the V
REF
DD
R
used as voltage reference.
6
0
pin used as voltage reference.
ZTCEN
R
5
0
REFLV
Rev. 1.2
R
4
0
Function
REFSL
R/W
3
0
TEMPE
R/W
2
0
BIASE
R/W
1
0
REF
REFBE
pin.
R/W
0
0