
R8C/2C Group, R8C/2D Group
Rev.2.00
Dec 05, 2007
REJ09B0339-0200
i = 0 or 1, j = either A, B, C, or D
NOTE:
1. After a count starts, the PWM period is fixed.
Table 14.46
Complementary PWM Mode Specifications
Item
Specification
Count sources
f1, f2, f4, f8, f32, fOCO40M
External signal input to the TRDCLK pin (valid edge selected by a program)
Set bits TCK2 to TCK0 in the TRDCR1 register to the same value (same count
source) as bits TCK2 to TCK0 in the TRDCR0 register.
Count operations
Increment or decrement
Registers TRD0 and TRD1 are decremented with the compare match in registers
TRD0 and TRDGRA0 during increment operation. The TRD1 register value is
changed from 0000h to FFFFh during decrement operation, and registers TRD0 and
TRD1 are incremented.
PWM operations
PWM period: 1/fk × (m+2-p) × 2
(1)Dead time: p
Active level width of normal-phase: 1/fk × (m-n-p+1) × 2
Active level width of counter-phase: 1/fk × (n+1-p) × 2
fk: Frequency of count source
m: Value set in the TRDGRA0 register
n: Value set in the TRDGRB0 register (PWM1 output)
Value set in the TRDGRA1 register (PWM2 output)
Value set in the TRDGRB1 register (PWM3 output)
p: Value set in the TRD0 register
Count start condition
1 (count starts) is written to bits TSTART0 and TSTART1 in the TRDSTR register.
Count stop conditions
0 (count stops) is written to bits TSTART0 and TSTART1 in the TRDSTR register
when the CSEL0 bit in the TRDSTR register is set to 1.
(The PWM output pin holds output level before the count stops.)
Interrupt request generation
timing
Compare match (The content of the TRDi register matches content of the TRDGRji
register.)
The TRD1 register underflows
TRDIOA0 pin function
Programmable I/O port or TRDCLK (external clock) input
TRDIOB0 pin function
PWM1 output normal-phase output
TRDIOD0 pin function
PWM1 output counter-phase output
TRDIOA1 pin function
PWM2 output normal-phase output
TRDIOC1 pin function
PWM2 output counter-phase output
TRDIOB1 pin function
PWM3 output normal-phase output
TRDIOD1 pin function
PWM3 output counter-phase output
TRDIOC0 pin function
Output inverted every 1/2 period of PWM
INT0 pin function
Programmable I/O port, pulse output forced cutoff signal input or INT0 interrupt input
Read from timer
The count value can be read by reading the TRDi register.
Write to timer
The value can be written to the TRDi register.
Select functions
)
The active level of normal-phase and counter-phase and initial output level
selected individually
Transfer timing from the buffer register selected
A/D trigger generated
n+1
Normal-phase
(When “L” is selected as the active level)
Counter-phase
m+2-p
n+1-p
p
m-p-n+1