C8051F320 Silicon Laboratories Inc, C8051F320 Datasheet - Page 148
C8051F320
Manufacturer Part Number
C8051F320
Description
IC 8051 MCU 16K FLASH 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F32xr
Datasheet
1.C8051F320R.pdf
(256 pages)
Specifications of C8051F320
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
25
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 17x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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C8051F320/1
148
Bits7-4:
Bits3-0:
R/W
Bit7
Bit7
R
-
This SFR is used to indirectly read and write USB0 registers.
Write Procedure:
1. Poll for BUSY (USB0ADR.7) => ‘0’.
2. Load the target USB0 register address into the USBADDR bits in register USB0ADR.
3. Write data to USB0DAT.
4. Repeat (Step 2 may be skipped when writing to the same USB0 register).
Read Procedure:
1. Poll for BUSY (USB0ADR.7) => ‘0’.
2. Load the target USB0 register address into the USBADDR bits in register USB0ADR.
3. Write ‘1’ to the BUSY bit in register USB0ADR (steps 2 and 3 can be performed in the same write).
4. Poll for BUSY (USB0ADR.7) => ‘0’.
5. Read data from USB0DAT.
6. Repeat from Step 2 (Step 2 may be skipped when reading the same USB0 register; Step 3 may be
Unused. Read = 0000b; Write = don’t care.
EPSEL: Endpoint Select
These bits select which endpoint is targeted when indexed USB0 registers are accessed.
INDEX
skipped when the AUTORD bit (USB0ADR.6) is logic 1).
R/W
Bit6
Bit6
0x4 - 0xF
R
Figure 15.6. INDEX: USB0 Endpoint Index (USB Register)
-
0x0
0x1
0x2
0x3
Figure 15.5. USB0DAT: USB0 Data Register
R/W
Bit5
Bit5
R
-
Target Endpoint
R/W
Bit4
Bit4
Reserved
R
-
USB0DAT
0
1
2
3
Rev. 1.1
R/W
R/W
Bit3
Bit3
R/W
R/W
Bit2
Bit2
EPSEL
R/W
R/W
Bit1
Bit1
R/W
R/W
Bit0
Bit0
USB Address:
SFR Address:
00000000
00000000
Reset Value
Reset Value
0x0E
0x97