tmp1940cyaf TOSHIBA Semiconductor CORPORATION, tmp1940cyaf Datasheet - Page 171

• Manufacturer Part Number: tmp1940cyaf
• Description: 32-bit Tx System Risc Tx19 Family
• Manufacturer: TOSHIBA Semiconductor CORPORATION

11.4.3
8-Bit Programmable Pulse Generation (PPG) Mode
shown below. The pulse can be high-going and low-going, as determined by the initial setting of the
timer flip-flop (TA1FF). This mode is supported by the TMRA0, but not by the TMRA1. The square-
wave output is driven to the TA1OUT pin (which is multiplexed with P71).
changes state every time a match is detected between the UC0 and the TA0REG and between the UC0
and the TA1REG.
must be put in a running state by setting the TA1RUN bit in the TA01RUN register to 1.
TA0REG-WR
The 8-bit PPG mode can be used to generate a square wave with any frequency and duty cycle, as
In this mode, a square wave is generated by toggling the timer flip-flop (TA1FF). The TA1FF
The TA0REG must be set to a value less than the TA1REG value.
In this mode, the TMRA1 up-counter (UC1) can not be independently used; however, the TMRA1
Figure 11.3 shows a functional diagram of 8-bit PPG mode.
TA01RUN.TA0RDE
Match Between TA1REG and
Match Between TA0REG and
TA01MOD.TA0CLK[1:0]
Figure 11.13 Functional Diagram of 8-Bit PPG Mode
Up-Counter 0 (INTTA1)
T1
T4
T16
Up-Counter 0 (INTTA0)
Selector
Figure 11.12 8-Bit PPG Output Waveform
Selector
Shift-Trigger
TA1OUT
Register Buffer
TMP1940CYAF-129
Comparator
TA0REG
Internal Data Bus
8-Bit Up-Counter
(UC0)
Comparator
t
H
TA1REG
TA01RUN.TA0RUN
t
TA0REG
TA1REG
t
L
TMP1940CYAF
TA1OUT
TA1FF
Toggle
TA1FFCR.TAFF1IE
INTTA0
INTTA1