HD404459 Datasheet, PDF (73/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
Timer write register C (upper digit) (TWCU: $00F)
Bit
Initial value
Read/Write
Bit name
3
2
1
0
Undefined Undefined Undefined Undefined
W
W
W
W
TWCU3 TWCU2 TWCU1 TWCU0
Figure 56 Timer Write Register C Upper Digit (TWCU)
• 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(figures 57 and 58).
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 57 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 58 Timer Read Register C Upper Digit(TRCU)
Timer D
Timer D Functions: Timer D (figures 59 (A) and (B)) has the following functions.
 Free-running/reload timer
 External event counter
 Timer output operation (toggle, 0, 1, and PWM outputs)
 Input capture timer
71