C8051F303-GSR Silicon Labs, C8051F303-GSR Datasheet - Page 173
C8051F303-GSR
Manufacturer Part Number
C8051F303-GSR
Description
8-bit Microcontrollers - MCU 8KB 14Pin MCU
Manufacturer
Silicon Labs
Datasheet
1.C8051F301-GSR.pdf
(178 pages)
Specifications of C8051F303-GSR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
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17. C2 Interface
C8051F300/1/2/3/4/5 devices include an on-chip Silicon Labs 2-Wire (C2) debug interface to allow Flash
programming and in-system debugging with the production part installed in the end application. The C2
interface operates using only two pins: a bi-directional data signal (C2D) and a clock input (C2CK). See the
C2 Interface Specification for details on the C2 protocol.
17.1. C2 Interface Registers
The following describes the C2 registers necessary to perform Flash programming functions through the
C2 interface. All C2 registers are accessed through the C2 interface as described in the C2 Interface Spec-
ification.
Bits7–0: The C2ADD register is accessed via the C2 interface to select the target Data register for
This read-only register returns the 8-bit device ID: 0x04 (C8051F300/1/2/3/4/5).
Bit7
Bit7
C2 Data Read and Data Write commands.
Address
0xB4
0xF1
0xA4
0x00
0x01
0x02
0x80
Bit6
Bit6
C2 Register Definition 17.2.
C2 Register Definition 17.1.
Bit5
Bit5
Selects the Device ID register for Data Read instructions
Selects the Revision ID register for Data Read instructions
Selects the C2 Flash Programming Control register for Data
Read/Write instructions
Selects the C2 Flash Programming Data register for Data
Read/Write instructions
Selects the Port0 register for Data Read/Write instructions
Selects the Port0 Input Mode register for Data Read/Write instruc-
tions
Selects the Port0 Output Mode register for Data Read/Write
instructions
Bit4
Bit4
Rev. 2.9
Bit3
Bit3
DEVICEID: C2 Device ID
Description
C2ADD: C2 Address
Bit2
Bit2
C8051F300/1/2/3/4/5
Bit1
Bit1
Bit0
Bit0
00000000
00000100
Reset Value
Reset Value
173
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