參數(shù)資料
型號(hào): MSP430C1351IPM
廠商: TEXAS INSTRUMENTS INC
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 8 MHz, RISC MICROCONTROLLER, PQFP64
封裝: PLASTIC, QFP-64
文件頁數(shù): 28/35頁
文件大小: 530K
代理商: MSP430C1351IPM
MSP430C13x1
MIXED SIGNAL MICROCONTROLLER
SLAS341B SEPTEMBER 2001 REVISED SEPTEMBER 2004
34
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
JTAG pins TMS, TCK, TDI, TDO/TDI, input/output with Schmitt-trigger
TDI
TDO
TMS
TCK
Test
JTAG
and
Emulation
Module
Burn & Test
Fuse
Controlled by JTAG
Controlled
by JTAG
DVCC
During Blowing of the Fuse, Pin
TDO/TDI Is Used to Apply the Test
Input Data for JTAG Circuitry
TDO/TDI
TDI/TCLK
TMS
TCK
Fuse
JTAG fuse check mode
MSP430 devices that have the fuse on the TDI/TCLK terminal have a fuse check mode that tests the continuity
of the fuse the first time the JTAG port is accessed after a power-on reset (POR). When activated, a fuse check
current, ITF, of 1 mA at 3 V can flow from the TDI/TCLK pin to ground if the fuse is not burned. Care must be
taken to avoid accidentally activating the fuse check mode and increasing overall system power consumption.
Activation of the fuse check mode occurs with the first negative edge on the TMS pin after power up or if the
TMS is being held low during power up. The second positive edge on the TMS pin deactivates the fuse check
mode. After deactivation, the fuse check mode remains inactive until another POR occurs. After each POR the
fuse check mode has the potential to be activated.
The fuse check current will only flow when the fuse check mode is active and the TMS pin is in a low state (see
Figure 13). Therefore, the additional current flow can be prevented by holding the TMS pin high (default
condition).
Time TMS Goes Low After POR
TMS
ITF
ITDI/TCLK
Figure 13. Fuse Check Mode Current
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