tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 341

• Manufacturer Part Number: tmp19a44fda
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

13
13.1 Overview
Two-phase Pulse Input Counter (PHCNT)
1) PHCNT incorporates 16-bit up-and-down counter of which default value is 0x7fff.
2) PHCNT counts up or down according to the combination of asynchronous two-phase pulse inputs.
3) Two-phase pulse input pins incorporate a noise filter that can be enabled or disabled.
4) Counting mode is selectable from normal mode or quadruple mode.
5) PHCNT can control generation of two kinds of compare interrupts and an interrupt that occurs by each count.
6) The control register can control an interrupt output.
7) The status register can distinguish an overflow interrupt, an underflow interrupt and a compare interrupt.
two-phase clock that is input through PHC0IN0 and PHC0IN1 and has phase difference. An interrupt is output
when a counter overflow or underflow occurs in the up-and-down counter mode, and when the counting operation
is executed. Interrupt is output in the ups and downs counter mode by the count operation.
There are two counting operation modes, which are switched by the register setting.
Two-phase Pulse Input Counter (PHCNT)
In this mode, the counter is incremented or decremented by one depending on the state transition of the
Each of the six channels (PHCNT0 through PHCNT5) has a two-phase input counter.
(The six channels operate in the same way. This section describes PHCNT0 only.)
1) Normal operation mode (up/down at the fourth count)
2) Quadruple mode (up/down at each count)
TMP19A44(rev1.3)13-1
TMP19A44
2010-05-10