Chapter 6 8-bit Timers

At cascade connection, the binary counter and the compare register are operated as a 16 bit regis- ter. At operation, set the TMnEN flag of the upper and lower 8-bit timers to "1" to be operated. Also, the clock source is the one which is selected in the lower 8-bit timer.

Other setup and count timing is the same to the 8-bit timer at independently operation.

When timer 0 and timer 1 are used in cascade connection, timer 1 interrupt request flag is used. Timer pulse output of timer 0 is "L" fixed output.

An interrupt request of timer 0 is not generated, and the timer 0 interrupt should be disabled.

At the cascade connection, if the binary counter should be cleared by rewriting the compare register, the TMnEN flags of the lower and upper 8 bits timers mode registers should be set to "0" to stop the counting, then rewrite the compare register.

VI - 40 Cascade Connection

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Panasonic MN101C77C, F77G user manual VI 40 Cascade Connection