C8051F321R Silicon Laboratories Inc, C8051F321R Datasheet - Page 156

• Manufacturer Part Number: C8051F321R
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F321R

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1067-2

C8051F320/1
156
Bits7-0:
Bits7-3:
Bits2-0:
Bit7
Bit7
R
R
-
Frame Number Low
This register contains bits7-0 of the last received frame number.
Unused. Read = 0. Write = don’t care.
Frame Number High Byte
This register contains bits10-8 of the last received frame number.
Figure 15.13. FRAMEH: USB0 Frame Number High (USB Register)
Figure 15.12. FRAMEL: USB0 Frame Number Low (USB Register)
Bit6
Bit6
R
R
-
Bit5
Bit5
R
R
-
Frame Number Low
Bit4
Bit4
R
R
-
Rev. 1.1
Bit3
Bit3
R
R
-
Bit2
Bit2
R
R
Frame Number High
Bit1
Bit1
R
R
Bit0
Bit0
R
R
USB Address:
USB Address:
00000000
00000000
Reset Value
Reset Value
0x0C
0x0D