C8051F021-GQR Silicon Laboratories Inc, C8051F021-GQR Datasheet - Page 226

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

Specifications of C8051F021-GQR

• 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
• For Use With: 336-1200 - DEV KIT FOR F020/F021/F022/F023
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

C8051F020/1/2/3
226
Bit7:
Bit6:
Bit5:
Bit4:
Bit3:
Bits2-0:
R/W
Bit7
-
UNUSED. Read = 0b, Write = don’t care.
T4M: Timer 4 Clock Select.
This bit controls the division of the system clock supplied to Timer 4. This bit is ignored when the
timer is in baud rate generator mode or counter mode (i.e. C/T4 = 1).
0: Timer 4 uses the system clock divided by 12.
1: Timer 4 uses the system clock.
T2M: Timer 2 Clock Select.
This bit controls the division of the system clock supplied to Timer 2. This bit is ignored when the
timer is in baud rate generator mode or counter mode (i.e. C/T2 = 1).
0: Timer 2 uses the system clock divided by 12.
1: Timer 2 uses the system clock.
T1M: Timer 1 Clock Select.
This bit controls the division of the system clock supplied to Timer 1.
0: Timer 1 uses the system clock divided by 12.
1: Timer 1 uses the system clock.
T0M: Timer 0 Clock Select.
This bit controls the division of the system clock supplied to Counter/Timer 0.
0: Counter/Timer uses the system clock divided by 12.
1: Counter/Timer uses the system clock.
Reserved. Read = 000b, Must Write = 000.
T4M
R/W
Bit6
Figure 22.1. CKCON: Clock Control Register
T2M
R/W
Bit5
T1M
R/W
Bit4
Rev. 1.4
T0M
R/W
Bit3
Reserved
R/W
Bit2
Reserved
R/W
Bit1
Reserved
R/W
Bit0
SFR Address:
00000000
Reset Value
0x8E