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EPSON
S1C88409 TECHNICAL MANUAL
CHAPTER 5: PERIPHERAL CIRCUITS AND OPERATION (Serial Interface)
5.14.10 I/O memory of serial interface
Table 5.14.10.1 shows the serial interface control bits.
Table 5.14.10.1(a) Serial interface control bits
Address
Function
R/W
Init
0
1
Comment
Name
Bit
00FF21
8-bit programmable timer
interrupt priority register
Serial interface
interrupt priority register
Clock timer
interrupt priority register
LCD controller
interrupt priority register
R/W
0
PTM21
PTM20
PSI1
PSI0
PCTM1
PCTM0
PLCD1
PLCD0
D7
D6
D5
D4
D3
D2
D1
D0
PTM21
PSI1
PCTM1
PLCD1
1
0
PTM20
PSI0
PCTM0
PLCD0
1
0
1
0
Priority
level
Level 3
Level 2
Level 1
Level 0
00FF24
8-bit programmable timer
underflow interrupt enable register
16-bit programmable timer 1
compare match interrupt enable register
16-bit programmable timer 1
underflow interrupt enable register
16-bit programmable timer 0
compare match interrupt enable register
16-bit programmable timer 0
underflow interrupt enable register
Serial interface
transmit completion interrupt enable register
Serial interface
receive completion interrupt enable register
Serial interface
receive error interrupt enable register
R/W
0
Interrupt is
disabled
Interrupt is
enabled
ETU2
ETC1
ETU1
ETC0
ETU0
ESTX
ESRX
ESERR
D7
D6
D5
D4
D3
D2
D1
D0
00FF28
8-bit programmable timer
underflow interrupt factor flag
16-bit programmable timer 1
compare match interrupt factor flag
16-bit programmable timer 1
underflow interrupt factor flag
16-bit programmable timer 0
compare match interrupt factor flag
16-bit programmable timer 0
underflow interrupt factor flag
Serial interface
transmit completion interrupt factor flag
Serial interface
receive completion interrupt factor flag
Serial interface
receive error interrupt factor flag
R/(W)
0
(R)
Interrupt
factor has not
generated
(W)
Invalid
(R)
Interrupt
factor has
generated
(W)
Reset
FTU2
FTC1
FTU1
FTC0
FTU0
FSTX
FSRX
FSERR
D7
D6
D5
D4
D3
D2
D1
D0
00FF38
–
8-bit programmable timer clock output control
8-bit programmable timer preset
8-bit programmable timer RUN/STOP control
–
R/W
W
R/W
–
0
–
0
–
Off
Invalid
Stop
–
On
Preset
Run
"0" when being read
–
PTOUT
PSET
PRUN
D7
D6
D5
D4
D3
D2
D1
D0
00FF40
Serial I/F terminal selection
Serial I/F parity enable
Serial I/F parity mode selection
Serial I/F stop bit selection
–
Serial I/F mode selection
Serial I/F enable
R/W
–
R/W
SMD1
1
0
SMD0
1
0
1
0
Mode
8-bit asynchronous
7-bit asynchronous
Clock synchronous slave
Clock synchronous master
0
–
0
P10–P13
No parity
Even
1 bit
–
I/O port
P14–P17
With parity
Odd
2 bits
–
Serial I/F
"0" when being read
SIOSEL
EPR
PMD
STPB
–
SMD1
SMD0
ESIF
D7
D6
D5
D4
D3
D2
D1
D0