Control Of Programmable Timer - Epson 0C88832 Technical Manual

5.10.10 Control of programmable timer

Table 5.10.10.1 shows the programmable timer control bits.
Address Bit Name
00FF30 D7 –
–
D6 – –
D5 –
–
D4 MODE16 8/16-bit mode selection
D3 CHSEL
TOUT output channel selection
D2 PTOUT TOUT output control
D1 CKSEL1
Prescaler 1 source clock selection
D0 CKSEL0 Prescaler 0 source clock selection
00FF31 D7 EVCNT
Timer 0 counter mode selection
D6 FCSEL Timer 0
function selection
D5 PLPOL
Timer 0
pulse polarity
selection
D4 PSC01
Timer 0 prescaler dividing ratio selection
D3 PSC00
D2 CONT0
Timer 0 continuous/one-shot mode selection
D1 PSET0 Timer 0 preset
D0 PRUN0
Timer 0 Run/Stop control
00FF32 D7 – –
D6 –
–
D5 – –
D4 PSC11
Timer 1 prescaler dividing ratio selection
D3 PSC10
D2 CONT1
Timer 1 continuous/one-shot mode selection
D1 PSET1 Timer 1 preset
D0 PRUN1
Timer 1 Run/Stop control
00FF33 D7 RLD07 Timer 0 reload data D7 (MSB)
D6 RLD06
Timer 0 reload data D6
D5 RLD05 Timer 0 reload data D5
D4 RLD04
Timer 0 reload data D4
D3 RLD03 Timer 0 reload data D3
D2 RLD02
Timer 0 reload data D2
D1 RLD01 Timer 0 reload data D1
D0 RLD00
Timer 0 reload data D0 (LSB)
E0C88832/88862 TECHNICAL MANUAL
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (Programmable Timer)
Table 5.10.10.1(a) Programmable timer control bits
Function
In timer mode
In event counter mode
Down count timing
in event counter mode
In pulse width
measurement mode
PSC01 PSC00 Prescaler dividing ratio
1 1 Source clock / 64
1 0 Source clock / 16
0 1 Source clock / 4
0 0 Source clock / 1
PSC11 PSC10 Prescaler dividing ratio
1 1 Source clock / 64
1 0 Source clock / 16
0 1 Source clock / 4
0 0 Source clock / 1
1
–
–
–
16-bit x 1 8-bit x 2
Timer 1 Timer 0
On
f
OSC3
f
OSC3
Event counter Timer
Pulse width Normal
measurement
With Without
noise rejector noise rejector
Rising edge Falling edge
of K10 input of K10 input
High level Low level
measurement measurement
for K10 input for K10 input
Continuous One-shot
Preset No operation
Run
–
–
–
Continuous One-shot
Preset No operation
Run
High
EPSON
0 SR R/W Comment
–
– Constantry "0" when
–
– being read
–
–
0 R/W
0 R/W
0 R/W
Off
0 R/W
f
OSC1
0 R/W
f
OSC1
0 R/W
0 R/W
mode
0 R/W
0 R/W
0 R/W
0 R/W
– W
"0" when being read
0 R/W
Stop
–
–
Constantry "0" when
–
–
being read
–
–
0 R/W
0 R/W
0 R/W
– W
"0" when being read
0 R/W
Stop
1 R/W
1 R/W
1 R/W
1 R/W
Low
1 R/W
1 R/W
1 R/W
1 R/W
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