tmp88ps42ng TOSHIBA Semiconductor CORPORATION, tmp88ps42ng Datasheet - Page 98

• Manufacturer Part Number: tmp88ps42ng
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

9. 16-Bit Timer (CTC)
9.1 Configuration
9.3.4 Programmable Pulse Generate (PPG) output mode
Table 9-3 Internal Clock Source for Compare Timer/Counter 1 (Example: fc = 20 MHz)
edges respectively selected with the CTC1CR1<CTC1SE> and CTC1CR1<CTC1E>). The source clock is an
internal clock. When matched with the CTC1DR A/B/C Registers, the timer output F/F corresponding to each
mode is inverted. When matched with the CTC1DR A/B/C Registers next time, the timer output F/F is inverted
again. An INTCTC1 interrupt request is generated when the counter value matches the maximum register
value set by CTC1CR2<CTCREG>. The timer output F/F is cleared to 0 when reset. Because
CTC1CR2<CTC1FF0> can be used to set the initial value for the timer output F/F, an active-high or active-
low pulse whichever is desired can be output. The CTC1DRB and CTC1DRC Registers cannot be accessed for
write unless they are set for PPG output mode and the registers used are selected with CTC1CR2<CTC1REG>.
The number of registers set can be altered during operation. In this case, however, be sure to set the number of
registers used and write values to the data registers before the next CTC1INIT1 is output after the first
CTC1INIT1 output. Even when only altering the data register values while leaving the number of registers
unchanged, be sure to do this within the same period of time.
CTC1CK
The timer/counter starts counting as a command or edge on CTC pin input (rising/falling edge and one/both
Note:When Port P47 is set as a CTC input port, an edge input resets the timer/counter. when PPG output mode is
000
001
010
100
101
011
110
selected and external trigger start is not used, set CTC1CR2<EXTRGDIS> to "1" or set P47 as an output port.
Table 9-2 External Clock Source for Compare Timer/Counter 1
Maximum applied frequency [Hz]
Resolution [μs]
Minimum pulse width
0.2
0.1
−
−
−
−
−
DV1CK = 0
Maximum Setting Time [s]
13.11 m
6.55 m
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−
−
−
−
−
NORMAL and IDLE Modes
NORMAL and IDLE Modes
2
2
Up to fc/2
/fc and over
Resolution [μs]
2
0.2
−
−
−
−
−
−
DV1CK = 1
Maximum Setting Time [s]
13.11m
−
−
−
−
−
−
TMP88PS42NG