E0C88832/88862 TECHNICAL MANUAL
EPSON
23
5 PERIPHERAL CIRCUITS AND THEIR OPERATION (I/O Memory Map)
Table 5.1.1(f) I/O Memory map (00FF45H–00FF49H)
Address Bit
Name
SR R/W
Function
Comment
1
0
00FF45 D7
D6
D5
D4
D3
D2
D1
D0
–
DUTY2
DUTY1
DUTY0
–
BZFQ2
BZFQ1
BZFQ0
–
Buzzer signal duty ratio selection
–
Buzzer frequency selection
"0" when being read
"0" when being read
–
0
0
0
–
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
–
–
–
–
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
8/16
7/16
6/16
5/16
4/16
3/16
2/16
1/16
4096.0
2048.0
8/20
7/20
6/20
5/20
4/20
3/20
2/20
1/20
3276.8
1638.4
12/24
11/24
10/24
9/24
8/24
7/24
6/24
5/24
2730.7
1365.3
12/28
11/28
10/28
9/28
8/28
7/28
6/28
5/28
2340.6
1170.3
2
1
0
Buzzer frequency (Hz)
DUTY2–1
BZFQ2
0
0
0
0
1
1
1
1
BZFQ1
0
0
1
1
0
0
1
1
BZFQ0
0
1
0
1
0
1
0
1
Frequency (Hz)
4096.0
3276.8
2730.7
2340.6
2048.0
1638.4
1365.3
1170.3
00FF48 D7
D6
D5
D4
D3
D2
D1
D0
–
EPR
PMD
SCS1
SCS0
SMD1
SMD0
ESIF
–
Parity enable register
Parity mode selection
Clock source selection
Serial I/F mode selection
Serial I/F enable register
"0" when being read
Only for
asynchronous mode
In the clock synchro-
nous slave mode,
external clock is
selected.
–
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
–
With parity
Odd
Serial I/F
–
Non parity
Even
I/O port
SCS1
1
1
0
0
SCS0
1
0
1
0
Clock source
Programmable timer
f
OSC3
/ 4
f
OSC3
/ 8
f
OSC3
/ 16
SMD1
1
1
0
0
SMD0
1
0
1
0
Mode
Asynchronous 8-bit
Asynchronous 7-bit
Clock synchronous slave
Clock synchronous master
00FF49 D7
D6
D5
D4
D3
D2
D1
D0
–
FER
PER
OER
RXTRG
RXEN
TXTRG
TXEN
–
Framing error flag
Parity error flag
Overrun error flag
Receive trigger/status
Receive enable
Transmit trigger/status
Transmit enable
"0" when being read
Only for
asynchronous mode
–
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
–
Error
Reset (0)
Error
Reset (0)
Error
Reset (0)
Run
Trigger
Enable
Run
Trigger
Enable
–
No error
No operation
No error
No operation
No error
No operation
Stop
No operation
Disable
Stop
No operation
Disable
R
W
R
W
R
W
R
W
R
W
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