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TNETV2501INPGF 数据表(PDF) 53 Page - Texas Instruments |
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TNETV2501INPGF 数据表(HTML) 53 Page - Texas Instruments |
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53 / 197 page  Functional Overview 53 December 2002 − Revised November 2008 SPRS206K 3.4.3 Timer Signal Selection Register (TSSR) The Timer Signal Selection Register (TSSR) controls several pin characteristics for Timer 0, Timer 1, and the Watchdog Timer. The TSSR can be used to specify whether the pins of Timer 0, Timer 1, and the Watchdog Timer are inputs or outputs. The TSSR also determines how the interrupt signal of the Watchdog Timer is connected internally and sets the function for the NMI/WDTOUT pin of the 5501. By default, all timer pins (TIM0, TIM1, and NMI/WDTOUT) are set as inputs, the interrupt signal of the Watchdog Timer is not internally connected to anything, and the NMI/WDTOUT pin has the function of the NMI signal. 15 8 Reserved R, 00000000 76 54 32 10 Reserved WDT_MODE TIM1_MODE TIM0_MODE IWCON NMI/WDTOUT _CFG R, 00 R/W, 0 R/W, 0 R/W, 0 R/W, 00 R/W, 1 LEGEND: R = Read, W = Write, n = value at reset Figure 3−8. Timer Signal Selection Register Layout (0x8000) Table 3−7. Timer Signal Selection Register Bit Field Description BIT NAME BIT NO. ACCESS RESET VALUE DESCRIPTION Reserved 15−6 R 0000000000 Reserved WDT_MODE 5 R/W 0 WDT pin mode WDT_MODE = 0: WDTOUT pin is used as the timer input pin. WDT_MODE = 1: WDTOUT pin is used as the timer output pin. TIM1_MODE 4 R/W 0 TIM1 pin mode TIM1_MODE = 0: TIM1 pin is used as the timer input pin. TIM1_MODE = 1: TIM1 pin is used as the timer output pin. TIM0_MODE 3 R/W 0 TIM0 pin mode TIM0_MODE = 0: TIM0 pin is used as the timer input pin. TIM0_MODE = 1: TIM0 pin is used as the timer output pin. † If NMI/WDTOUT_CFG = 1 and IWCON = 10, only the WDTOUT signal will drive the NMI signal; the external source driving the NMI/WDTOUT pin will be ignored. |
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