C8051F321 Silicon Laboratories Inc, C8051F321 Datasheet - Page 253
C8051F321
Manufacturer Part Number
C8051F321
Description
IC 8051 MCU 16K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F32xr
Datasheet
1.C8051F320R.pdf
(256 pages)
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
-
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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
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