C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 253

• 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: -

21.
C8051F320/1 devices include an on-chip Silicon Labs 2-Wire (C2) debug interface to allow FLASH programming,
boundary scan functions, and in-system debugging with the production part installed in the end application. The C2
interface uses a clock signal (C2CK) and a bi-directional C2 data signal (C2D) to transfer information between the
device and a host system. See the C2 Interface Specification for details on the C2 protocol.
21.1. C2 Interface Registers
The following describes the C2 registers necessary to perform FLASH programming and boundary scan functions
through the C2 interface. All C2 registers are accessed through the C2 interface as described in the C2 Interface Spec-
ification.
Bits7-0:
This read-only register returns the 8-bit device ID: 0x09 (C8051F320/1).
Bit7
Bit7
C2 INTERFACE
The C2ADD register is accessed via the C2 interface to select the target Data register for C2 Data
Read and Data Write commands.
Address
0xB4
0x00
0x01
0x02
Bit6
Bit6
Figure 21.2. DEVICEID: C2 Device ID Register
Figure 21.1. C2ADD: C2 Address Register
Bit5
Bit5
Selects the C2 FLASH Programming Data register for Data Read/Write
Selects the C2 FLASH Programming Control register for Data
Selects the Revision ID register for Data Read instructions
Selects the Device ID register for Data Read instructions
Bit4
Bit4
Bit3
Bit3
Read/Write instructions
Rev. 1.1
Description
instructions
Bit2
Bit2
Bit1
Bit1
C8051F320/1
Bit0
Bit0
00000000
00001001
Reset Value
Reset Value
253