TNETV2501INPGF datasheet(53/197 Pages) TI1

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Functional Overview

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.

Reserved

R, 00000000

Reserved

WDT_MODE

TIM1_MODE

TIM0_MODE

IWCON

NMI/WDTOUT

_CFG

R, 00

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

0000000000

Reserved

WDT_MODE

R/W

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

R/W

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

R/W

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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