C8051F502-IMR Silicon Laboratories Inc, C8051F502-IMR Datasheet - Page 250

• 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 24.3. SBUF0: Serial (UART0) Port Data Buffer
SFR Address = 0x99; SFR Page = 0x00
SFR Definition 24.4. SBCON0: UART0 Baud Rate Generator Control
SFR Address = 0xAB; SFR Page = 0x0F
250
Name
Reset
Name Reserved
Reset
7:0 SBUF0[7:0] Serial Data Buffer Bits 7–0 (MSB–LSB).
5:2
1:0 SB0PS[1:0] Baud Rate Prescaler Select.
Bit
Bit
Type
Type
7
6
Bit
Bit
Reserved
Reserved
SB0RUN
Name
Name
R/W
7
0
7
0
This SFR accesses two registers; a transmit shift register and a receive latch register.
When data is written to SBUF0, it goes to the transmit shift register and is held for
serial transmission. Writing a byte to SBUF0 initiates the transmission. A read of
SBUF0 returns the contents of the receive latch.
Baud Rate Generator Enable.
0: Baud Rate Generator disabled. UART0 will not function.
1: Baud Rate Generator enabled.
Read = 0000b; Must Write = 0000b;
00: Prescaler = 12.
01: Prescaler = 4.
10: Prescaler = 48.
11: Prescaler = 1.
Read = 0b; Must Write 0b;
SB0RUN
R/W
6
0
6
0
Reserved
R/W
5
0
5
0
Reserved
R/W
Rev. 1.2
4
0
4
0
SBUF0[7:0]
R/W
Function
Function
Reserved
R/W
3
0
3
0
Reserved
R/W
2
0
2
0
1
0
1
0
SB0PS[1:0]
R/W
0
0
0
0