C8051F021 Silicon Laboratories Inc, C8051F021 Datasheet - Page 88

• Manufacturer Part Number: C8051F021
• Description: IC 8051 MCU 64K FLASH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F02xr

Specifications of C8051F021

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b, 8x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

C8051F020/1/2/3
88
Bit7:
Bits6-5:
Bits4-3:
Bits2-0:
DAC1EN
MSB
R/W
Bit7
MSB
DAC1EN: DAC1 Enable Bit.
0: DAC1 Disabled. DAC1 Output pin is disabled; DAC1 is in low-power shutdown mode.
1: DAC1 Enabled. DAC1 Output pin is active; DAC1 is operational.
UNUSED. Read = 00b; Write = don’t care.
DAC1MD1-0: DAC1 Mode Bits:
00: DAC output updates occur on a write to DAC1H.
01: DAC output updates occur on Timer 3 overflow.
10: DAC output updates occur on Timer 4 overflow.
11: DAC output updates occur on Timer 2 overflow.
DAC1DF2: DAC1 Data Format Bits:
000:
001:
010:
011:
1xx:
MSB
R/W
Bit6
-
The most significant nibble of the DAC1 Data Word is in DAC1H[3:0], while the least
significant byte is in DAC1L.
The most significant 5-bits of the DAC1 Data Word is in DAC1H[4:0], while the least
significant 7-bits are in DAC1L[7:1].
The most significant 6-bits of the DAC1 Data Word is in DAC1H[5:0], while the least
significant 6-bits are in DAC1L[7:2].
The most significant 7-bits of the DAC1 Data Word is in DAC1H[6:0], while the least
significant 5-bits are in DAC1L[7:3].
The most significant 8-bits of the DAC1 Data Word is in DAC1H[7:0], while the least
significant 4-bits are in DAC1L[7:4].
MSB
DAC1H
DAC1H
DAC1H
DAC1H
DAC1H
Figure 8.7. DAC1CN: DAC1 Control Register
R/W
Bit5
MSB
-
DAC1MD1 DAC1MD0 DAC1DF2 DAC1DF1 DAC1DF0 00000000
R/W
Bit4
Rev. 1.4
R/W
Bit3
R/W
Bit2
LSB
R/W
Bit1
DAC1L
DAC1L
DAC1L
DAC1L
DAC1L
LSB
R/W
Bit0
LSB
LSB
SFR Address:
Reset Value
0xD7
LSB