參數(shù)資料
型號: C8051F000
廠商: Silicon Laboratories Inc
文件頁數(shù): 73/171頁
文件大?。?/td> 0K
描述: IC 8051 MCU 32K FLASH 64TQFP
標(biāo)準(zhǔn)包裝: 160
系列: C8051F00x
核心處理器: 8051
芯體尺寸: 8-位
速度: 20MHz
連通性: SMBus(2 線/I²C),SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b,D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 托盤
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
21. JTAG (IEEE 1149.1)
Each MCU has an on-chip JTAG interface and logic to support boundary scan for production and in-system testing,
Flash read and 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 via four dedicated pins on the MCU, which are TCK, TMS, TDI, and TDO. These pins are
all 5V tolerant.
Through the 16-bit JTAG Instruction Register (IR), any of the eight instructions shown in Figure 21.1 can be
commanded. There are three Data Registers (DR’s) associated with JTAG Boundary-Scan, and four associated with
Flash read/write operations on the MCU.
Figure 21.1. IR: JTAG Instruction Register
Reset Value
0x0004
Bit15
Bit0
IR value
Instruction
Description
0x0000
EXTEST
Selects the Boundary Data Register for control and observability of all
device pins
0x0002
SAMPLE/
PRELOAD
Selects the Boundary Data Register for observability and presetting the
scan-path latches
0x0004
IDCODE
Selects device ID Register
0xFFFF
BYPASS
Selects Bypass Data Register
0x0082
Flash Control
Selects FLASHCON Register to control how the interface logic responds to
reads and writes to the FLASHDAT Register
0x0083
Flash Data
Selects FLASHDAT Register for reads and writes to the Flash memory
0x0084
Flash Address
Selects FLASHADR Register which holds the address of all Flash read,
write, and erase operations
0x0085
Flash Scale
Selects FLASHSCL Register which controls the prescaler used to generate
timing signals for Flash operations
Rev. 1.7
164
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