C8051F321-GMR Silicon Laboratories Inc, C8051F321-GMR Datasheet - Page 141

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

Specifications of C8051F321-GMR

• 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
• Processor Series: C8051F3x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 2.25 KB
• Interface Type: I2C, SMBus, SPI, UART, USB
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F320DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 13 Channel / 10 bit, 7 Channel
• Package: 28MLP
• Device Core: 8051
• Family Name: C8051F321
• Maximum Speed: 25 MHz
• Operating Supply Voltage: 3.3 V
• For Use With: 336-1480 - DAUGHTER CARD TOOLSTCK C8051F321336-1449 - ADAPTER PROGRAM TOOLSTICK F321336-1260 - DEV KIT FOR C8051F320/F321
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Bit7:
Bit6:
Bit5:
Bits4–3: PHYTST1–0: Physical Layer Test
Bit2:
Bit1:
Bit0:
PREN
R/W
Bit7
PREN: Internal Pull-up Resistor Enable
The location of the pull-up resistor (D+ or D–) is determined by the SPEED bit.
0: Internal pull-up resistor disabled (device effectively detached from the USB network).
1: Internal pull-up resistor enabled when VBUS is present (device attached to the USB net-
work).
PHYEN: Physical Layer Enable
This bit enables/disables the USB0 physical layer transceiver.
0: Transceiver disabled (suspend).
1: Transceiver enabled (normal).
SPEED: USB0 Speed Select
This bit selects the USB0 speed.
0: USB0 operates as a Low Speed device. If enabled, the internal pull-up resistor appears
on the D– line.
1: USB0 operates as a Full Speed device. If enabled, the internal pull-up resistor appears on
the D+ line.
These bits can be used to test the USB0 transceiver.
DFREC: Differential Receiver
The state of this bit indicates the current differential value present on the D+ and D– lines
when PHYEN = ‘1’.
0: Differential ‘0’ signaling on the bus.
1: Differential ‘1’ signaling on the bus.
Dp: D+ Signal Status
This bit indicates the current logic level of the D+ pin.
0: D+ signal currently at logic 0.
1: D+ signal currently at logic 1.
Dn: D- Signal Status
This bit indicates the current logic level of the D– pin.
0: D– signal currently at logic 0.
1: D– signal currently at logic 1.
PHYTST[1:0]
PHYEN
SFR Definition 15.1. USB0XCN: USB0 Transceiver Control
R/W
Bit6
00b
01b
10b
11b
SPEED
R/W
Bit5
Mode 0: Normal (non-test mode)
Mode 1: Differential ‘1’ Forced
Mode 2: Differential ‘0’ Forced
Mode 3: Single-Ended ‘0’ Forced
PHYTST1 PHYTST0 DFREC
R/W
Bit4
Mode
Rev. 1.4
R/W
Bit3
Bit2
R
D+
X
1
0
0
D–
X
0
1
0
Dp
Bit1
R
C8051F320/1
Bit0
Dn
R
SFR Address:
00000000
Reset Value
0xD7
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