Epson 0C88832 Technical Manual page 28

5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Address Bit Name
00FF40 D7 –
–
D6 FOUT2
FOUT frequency selection
D5 FOUT1
D4 FOUT0
D3 FOUTON
FOUT output control
D2 WDRST
Watchdog timer reset
D1 TMRST
Clock timer reset
D0 TMRUN
Clock timer Run/Stop control
00FF41 D7 TMD7
Clock timer data
D6 TMD6
Clock timer data
D5 TMD5
Clock timer data
D4 TMD4
Clock timer data
D3 TMD3
Clock timer data
D2 TMD2
Clock timer data
D1 TMD1
Clock timer data
D0 TMD0
Clock timer data
00FF42 D7 –
–
D6 – –
D5 – –
D4 – –
D3 – –
D2 – –
D1 SWRST Stopwatch timer reset
D0 SWRUN Stopwatch timer Run/Stop control
00FF43 D7 SWD7 Stopwatch timer data
D6 SWD6
D5 SWD5 BCD (1/10 sec)
D4 SWD4
D3 SWD3 Stopwatch timer data
D2 SWD2
D1 SWD1 BCD (1/100 sec)
D0 SWD0
00FF44 D7 – –
D6 BZSTP One-shot buzzer forcibly stop
D5 BZSHT One-shot buzzer trigger/status
D4 SHTPW One-shot buzzer duration width selection
D3 ENRTM Envelope attenuation time
D2 ENRST
Envelope reset
D1 ENON
Envelope On/Off control
D0 BZON
Buzzer output control
*1 Reset to "0" during one-shot output.
22
Table 5.1.1(e) I/O Memory map (00FF40H–00FF44H)
Function
FOUT2 FOUT1 FOUT0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
1 Hz
2 Hz
4 Hz
8 Hz
16 Hz
32 Hz
64 Hz
128 Hz
1
–
Frequency
f / 1
OSC1
f / 2
OSC1
f / 4
OSC1
f / 8
OSC1
f / 1
OSC3
f / 2
OSC3
f / 4
OSC3
f / 8
OSC3
On
Reset
Reset
Run
High
–
–
–
–
–
–
Reset
Run
–
Forcibly stop
R
Busy
W
Trigger
125 msec
1 sec
Reset
On
On
EPSON
0 SR R/W
–
– "0" when being read
0 R/W
0 R/W
This is just R/W
register on
E0C88862.
0 R/W
0 R/W
Off
– W
No operation Constantly "0" when
– W
No operation being read
0 R/W
Stop
0 R
0 R
0 R
0 R
Low
0 R
0 R
0 R
0 R
–
–
–
–
–
–
Constantly "0" when
–
–
being read
–
–
–
–
– W
No operation
0 R/W
Stop
0 R
0 R
0 R
0 R
0 R
0 R
0 R
0 R
–
– Constantry "0" when
– W
No operation being read
0 R/W
Ready
No operation
0 R/W
31.25 msec
0 R/W
0.5 sec
– W
No operation "0" when being read
0 R/W
Off *1
0 R/W
Off
E0C88832/88862 TECHNICAL MANUAL
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