HD404639R Datasheet, PDF (73/135 Pages) Renesas Technology Corp – 4-Bit Single-Chip Microcomputer

HD404639R Series
• Timer read register C (TRCL: $00E, TRCU: $00F): Read-only register consisting of a lower digit
(TRCL) and an upper digit (TRCU) that holds the count of the timer C upper digit as shown in figures
56 and 57. The operation of timer read register C is basically the same as that of timer read register B
(TRBL: $00A, TRBU: $00B).
Timer read register C (lower digit) (TRCL: $00E)
Bit
Initial value
Read/Write
Bit name
3
2
1
0
Undefined Undefined Undefined Undefined
R
R
R
R
TRCL3 TRCL2 TRCL1 TRCL0
Figure 56 Timer Read Register C Lower Digit (TRCL)
Timer read register C (upper digit) (TRCU: $00F)
Bit
Initial value
Read/Write
Bit name
3
2
1
0
Undefined Undefined Undefined Undefined
R
R
R
R
TRCU3 TRCU2 TRCU1 TRCU0
Figure 57 Timer Read Register C Upper Digit (TRCU)
Timer D
Timer D Functions: Timer D has the following functions.
• Free-running/reload timer
• External event counter
• Timer output operation (toggle, 0, 1, and PWM outputs)
• Input capture timer
The block diagram for each operation mode of timer D is shown in figures 58 (A) and (B).
71