IC 8051 MCU 64K FLASH 64TQFP

C8051F023R

Manufacturer Part NumberC8051F023R
DescriptionIC 8051 MCU 64K FLASH 64TQFP
ManufacturerSilicon Laboratories Inc
SeriesC8051F02x
C8051F023R datasheets
 


Specifications of C8051F023R

Core Processor8051Core Size8-Bit
Speed25MHzConnectivityEBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
PeripheralsBrown-out Detect/Reset, POR, PWM, Temp Sensor, WDTNumber Of I /o32
Program Memory Size64KB (64K x 8)Program Memory TypeFLASH
Ram Size4.25K x 8Voltage - Supply (vcc/vdd)2.7 V ~ 3.6 V
Data ConvertersA/D 8x8b, 8x10b; D/A 2x12bOscillator TypeInternal
Operating Temperature-40°C ~ 85°CPackage / Case64-TQFP, 64-VQFP
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantEeprom Size-
Other names336-1035-2  
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C8051F020/1/2/3
18.4.2. Clock Rate Register
Figure 18.9. SMB0CR: SMBus0 Clock Rate Register
R/W
R/W
R/W
Bit7
Bit6
Bit5
Bits7-0:
SMB0CR.[7:0]: SMBus0 Clock Rate Preset
The SMB0CR Clock Rate register controls the frequency of the serial clock SCL in master mode. The
8-bit word stored in the SMB0CR Register preloads a dedicated 8-bit timer. The timer counts up, and
when it rolls over to 0x00, the SCL logic state toggles.
The SMB0CR setting should be bounded by the following equation , where SMB0CR is the unsigned
8-bit value in register SMB0CR, and SYSCLK is the system clock frequency in Hz:
SMB0CR
The resulting SCL signal high and low times are given by the following equations:
T
LOW
T
HIGH
Using the same value of SMB0CR from above, the Bus Free Timeout period is given in the following
equation:
T
BFT
192
R/W
R/W
R/W
Bit4
Bit3
Bit2
 
SYSCLK  1.125 
288
0.85
 SYSCLK
=
256 SMB0CR
 SYSCLK
258 SMB0CR
+
256 SMB0CR
+
1
---------------------------------------------------- -
10
SYSCLK
Rev. 1.4
R/W
R/W
Reset Value
00000000
Bit1
Bit0
SFR Address:
0xCF
625ns