C8051F122 Silicon Laboratories Inc, C8051F122 Datasheet - Page 298

• Manufacturer Part Number: C8051F122
• Description: IC 8051 MCU FLASH 128K 100TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F12xr

Specifications of C8051F122

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 100MHz
• Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 64
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x8b, 8x10b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
298
Bits7–0: SADDR0.[7:0]: UART0 Slave Address
Bits7–0: SADEN0.[7:0]: UART0 Slave Address Enable
Bits7–0: SBUF0.[7:0]: UART0 Buffer Bits 7–0 (MSB–LSB)
R/W
R/W
R/W
Bit7
Bit7
Bit7
The contents of this register are used to define the UART0 slave address. Register SADEN0
is a bit mask to determine which bits of SADDR0 are checked against a received address:
corresponding bits set to logic 1 in SADEN0 are checked; corresponding bits set to logic 0
are “don’t cares”.
Bits in this register enable corresponding bits in register SADDR0 to determine the UART0
slave address.
0: Corresponding bit in SADDR0 is a “don’t care”.
1: Corresponding bit in SADDR0 is checked against a received address.
This is actually two registers; a transmit and a receive buffer register. When data is moved
to SBUF0, it goes to the transmit buffer and is held for serial transmission. Moving a byte to
SBUF0 is what initiates the transmission. When data is moved from SBUF0, it comes from
the receive buffer.
SFR Definition 21.5. SADEN0: UART0 Slave Address Enable
R/W
R/W
R/W
Bit6
Bit6
Bit6
SFR Definition 21.4. SADDR0: UART0 Slave Address
SFR Definition 21.3. SBUF0: UART0 Data Buffer
R/W
R/W
R/W
Bit5
Bit5
Bit5
R/W
R/W
Bit4
Bit4
R/W
Bit4
Rev. 1.4
R/W
R/W
Bit3
Bit3
R/W
Bit3
R/W
R/W
Bit2
Bit2
R/W
Bit2
R/W
R/W
R/W
Bit1
Bit1
Bit1
SFR Address:
SFR Address:
SFR Address:
SFR Page:
SFR Page:
SFR Page:
R/W
R/W
Bit0
Bit0
R/W
Bit0
0xB9
0
0xA9
0
00000000
Reset Value
0x99
0
00000000
Reset Value
00000000
Reset Value