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EPSON
S1C88409 TECHNICAL MANUAL
CHAPTER 5: PERIPHERAL CIRCUITS AND OPERATION (8-bit Programmable Timer)
5.13.6 I/O memory of 8-bit programmable timer
Table 5.13.6.1 shows the 8-bit programmable timer control bits.
Table 5.13.6.1(a) 8-bit programmable timer control bits
Address
Function
R/W
Init
0
1
Comment
Name
Bit
00FF11
–
8-bit programmable timer clock control
8-bit programmable timer division ratio
–
R/W
–
0
–
Off
–
On
"0" when being read
–
PRPRT2
PST22
PST21
PST20
D7
D6
D5
D4
D3
D2
D1
D0
PST22
1
0
PST21
1
0
1
0
PST20
1
0
1
0
1
0
1
0
Division ratio
fOSC3 / 256
fOSC3 / 128
fOSC3 / 64
fOSC3 / 32
fOSC3 / 16
fOSC3 / 8
fOSC3 / 4
fOSC3 / 2
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