参数资料
型号: MSP430F2617TZQWR
厂商: TEXAS INSTRUMENTS INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PBGA113
封装: GREEN, PLASTIC, BGA-113
文件页数: 90/102页
文件大小: 1509K
代理商: MSP430F2617TZQWR
Time TMS Goes Low After POR
TMS
ITF
ITDI/TCLK
MSP430F261x
MSP430F241x
SLAS541H
– JUNE 2007 – REVISED MAY 2011
JTAG Fuse Check Mode
MSP430 devices that have the fuse on the TEST 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, 2.5 mA at 5 V can flow from the TEST 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.
When the TEST pin is again taken low after a test or programming session, the fuse check mode and sense
currents are terminated.
Activation of the fuse check mode occurs with the first negative edge on the TMS pin after power up or if 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 flows only when the fuse check mode is active and the TMS pin is in a low state (see
Figure 49). Therefore, the additional current flow can be prevented by holding the TMS pin high (default
condition).
Figure 49. Fuse Check Mode Current
88
Copyright
2007–2011, Texas Instruments Incorporated
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