tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 214

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

14. 8-bit Timer Counter (TC0)
RA002
14.4.8 16-bit programmable pulse generate (PPG) output mode
14.4.8.1 Setting
14.4.8.2 Operations
and arbitrary pulse width and duty. Two 16-bit registers, T01+00REG and T01+00PWM, are used to output the
pulses. This enables output of longer pulses than an 8-bit timer.
In the 16-bit PPG mode, TC00 and TC01 are cascaded to output the pulses that have a resolution of 16 bits
tings of TC00 are ignored and those of TC01 are effective in the 16-bit mode.
source clock, set T01MOD<EIN1> to "0" and select the clock at T01MOD<TCK1>. To use an external
clock as the source clock, set T01MOD<EIN0> to "1".
T00REG. Set the count value that corresponds to a duty pulse as a 16-bit value at T01PWM and T00PWM
(hereinafter, the 16-bit value specified by the combined setting of T01REG and T00REG is indicated as
T01+00REG, and the 16-bit value specified by the combined setting of T01PWM and T00PWM is indi-
cated as T01+00PWM). The timer register settings are reflected on the double buffer or T01+00PWM and
T01+00REG when a write instruction is executed on T01PWM. Be sure to execute the write instructions
on T00REG, T01REG and T00PWM before executing a write instruction on T01PWM. (When data is
written to T01PWM, the set values of the four timer registers become effective at the same time.)
"L" level as the initial state of the
initial state of the
timer is stopped, the value of T01MOD<TFF1> is output to the
output levels of the
clock. When a match between the up counter value and the value set to T01+00PWM is detected, the out-
put of the
level. When T01MOD<TFF1> is "1", the
INTT00 interrupt request is generated.
T01+00REG is detected, the output of the
PPG1
the "L" to "H" level. At this time, an INTT01 interrupt request is generated and the up counter is cleared to
"0x0000".
cleared to "0x0000". The
Setting T001CR<TCAS> to "1" connects TC00 and TC01 and activates the 16-bit mode. All the set-
The 16-bit PPG mode is selected by setting T01MOD<TCM1> to "11". To use the internal clock as the
Set T01MOD<DBE1> to "1" to use the double buffer.
Set the count value that corresponds to a cycle as a 16-bit value at the timer registers T01REG and
Set the initial state of the
Setting T001CR<T01RUN> to "1" allows the up counter to increment based on the selected source
The up counter continues counting up. When a match between the up counter value and the value set to
When T001CR<T01RUN> is set to "0" during the timer operation, the up counter is stopped and
Table 14-13 List of Output Levels of
pin changes from the "H" to "L" level. When T01MOD<TFF1> is "1", the
PPG1
TFF1
0
1
pin is reversed. When T01MOD<TFF1> is "0", the
PPG1
PPG1
Before the start
of operation
(initial state)
pin. If the
pin.
PPG1
H
L
PPG1
pin returns to the level selected at T01MOD<TFF1>.
PPG1
pin at T01MOD<TFF1>. Setting T01MOD<TFF1> to "0" selects the
PPG1
T01+00PWM
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pin. Setting T01MOD<TFF1> to "1" selects the "H" level as the
pin is set as the function output pin in the port setting while the
matched
PPG1
PPG1
H
L
PPG1
PPG1
pin output level
pin is reversed again. When T01MOD<TFF1> is "0", the
pin changes from the "H" to "L" level. At this time, an
Pin
T01+00REG
matched
H
L
PPG1
PPG1
(initial state)
pin. Table 14-13 shows the list of
Operation
stopped
pin changes from the "L" to "H"
H
L
PPG1
pin changes from
TMP89FM42