C8051F020DK Silicon Laboratories Inc, C8051F020DK Datasheet - Page 265

• Manufacturer Part Number: C8051F020DK
• Description: DEV KIT FOR F020/F021/F022/F023
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F020DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F02x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F020
• Silicon Family Name: C8051F02x
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Silicon Laboratories C8051 F020/021/022/023
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1200

24.
Each MCU has an on-chip JTAG interface and logic to support boundary scan for production and in-system testing,
Flash read/write operations, and non-intrusive in-circuit debug. The JTAG interface is fully compliant with the IEEE
1149.1 specification. Refer to this specification for detailed descriptions of the Test Interface and Boundary-Scan
Architecture. Access of the JTAG Instruction Register (IR) and Data Registers (DR) are as described in the Test
Access Port and Operation of the IEEE 1149.1 specification.
The JTAG interface is accessed via four dedicated pins on the MCU: TCK, TMS, TDI, and TDO.
Through the 16-bit JTAG Instruction Register (IR), any of the seven instructions shown in Figure 24.1 can be com-
manded. There are three DR’s associated with JTAG Boundary-Scan, and four associated with Flash read/write oper-
ations on the MCU.
Bit15
IR Value
0xFFFF
0x0000
0x0002
0x0004
0x0082
0x0083
0x0084
JTAG (IEEE 1149.1)
Flash Address
Flash Control
PRELOAD
Instruction
SAMPLE/
Flash Data
EXTEST
IDCODE
BYPASS
Figure 24.1. IR: JTAG Instruction Register
Selects the Boundary Data Register for control and observability of all device pins
Selects FLASHADR Register which holds the address of all Flash read, write, and
Selects FLASHCON Register to control how the interface logic responds to reads
Selects the Boundary Data Register for observability and presetting the scan-path
Selects FLASHDAT Register for reads and writes to the Flash memory
and writes to the FLASHDAT Register
Selects Bypass Data Register
Rev. 1.4
Selects device ID Register
erase operations
Description
latches
C8051F020/1/2/3
Bit0
Reset Value
0x0000
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