C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 169

• Manufacturer Part Number: C8051F321
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F321

• 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: -

Bit7:
Bit6:
Bit5:
Bit4:
Bit3:
Bit2:
Bits1-0:
DBIEN
R/W
Bit7
Figure 15.23. EINCSRH: USB0 IN Endpoint Control Low Byte (USB Register)
DBIEN: IN Endpoint Double-buffer Enable.
0: Double-buffering disabled for the selected IN endpoint.
1: Double-buffering enabled for the selected IN endpoint.
ISO: Isochronous Transfer Enable.
This bit enables/disables isochronous transfers on the current endpoint.
0: Endpoint configured for bulk/interrupt transfers.
1: Endpoint configured for isochronous transfers.
DIRSEL: Endpoint Direction Select.
This bit is valid only when the selected FIFO is not split (SPLIT = ‘0’).
0: Endpoint direction selected as OUT.
1: Endpoint direction selected as IN.
Unused. Read = ‘0’. Write = don’t care.
FCDT: Force Data Toggle.
0: Endpoint data toggle switches only when an ACK is received following a data packet transmission.
1: Endpoint data toggle forced to switch after every data packet is transmitted, regardless of ACK
reception.
SPLIT: FIFO Split Enable.
When SPLIT = ‘1’, the selected endpoint FIFO is split. The upper half of the selected FIFO is used by
the IN endpoint; the lower half of the selected FIFO is used by the OUT endpoint.
Unused. Read = 00b; Write = don’t care.
ISO
R/W
Bit6
DIRSEL
R/W
Bit5
Bit4
R
-
FCDT
R/W
Bit3
Rev. 1.1
SPLIT
R/W
Bit2
Bit1
R
-
C8051F320/1
Bit0
R
-
USB Address:
00000000
Reset Value
0x12
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