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EPSON
S1C88409 TECHNICAL MANUAL
CHAPTER 5: PERIPHERAL CIRCUITS AND OPERATION (16-bit Programmable Timer)
PRTF0: 16-bit programmable timer 0
source clock selection register (00FF12HD0)
Selects the source clock for the 16-bit program-
mable timer 0.
When "1" is written: fOSC1
When "0" is written: fOSC3
Reading: Valid
When "1" is written to the PRTF0 register, the
OSC1 clock is selected as the source clock for the
16-bit programmable timer 0.
When "0" is written, the OSC3 clock is selected.
At initial reset, the PRTF0 register is set to "0"
(fOSC3).
PST00–PST02: 16-bit programmable timer 0
division ratio selection register (00FF10HD0–D2)
Selects the clock for the 16-bit programmable timer
0.
It can be selected from 8 types of division ratio
shown in Table 5.12.7.1(a).
This register can also be read.
At initial reset, the PST0 register is set to "0".
PRPRT0: 16-bit programmable timer 0
clock control register (00FF10HD3)
Controls the clock supply of the 16-bit program-
mable timer 0.
When "1" is written: ON
When "0" is written: OFF
Reading: Valid
By writing "1" to the PRPRT0 register, the clock
that is selected with the PST0 register is output to
the 16-bit programmable timer 0.
When "0" is written, the clock is not output.
At initial reset, the PRPRT0 register is set to "0"
(OFF).
PK10ON: EXCL00 clock control register
(00FF15HD0)
Controls the event counter clock of the 16-bit
programmable timer 0.
When "1" is written: ON
When "0" is written: OFF
Reading: Valid
By writing "1" to the PK10ON register, the EXCL00
(K10 input) clock is output to the 16-bit program-
mable timer 0.
When "0" is written, the clock is not output.
At initial reset, the PK10ON register is set to "0"
(OFF).
PRTF1: 16-bit programmable timer 1
source clock selection register (00FF12HD1)
Selects the source clock for the 16-bit program-
mable timer 1.
When "1" is written: fOSC1
When "0" is written: fOSC3
Reading: Valid
When "1" is written to the PRTF1 register, the
OSC1 clock is selected as the source clock for the
16-bit programmable timer 1.
When "0" is written, the OSC3 clock is selected.
At initial reset, the PRTF1 register is set to "0"
(fOSC3).
PST10–PST12: 16-bit programmable timer 1
division ratio selection register (00FF10HD4–D6)
Selects the clock for the 16-bit programmable timer
1.
It can be selected from 8 types of division ratio
shown in Table 5.12.7.1(a).
This register can also be read.
At initial reset, the PST1 register is set to "0".
PRPRT1: 16-bit programmable timer 1
clock control register (00FF10HD7)
Controls the clock supply of the 16-bit program-
mable timer 1.
When "1" is written: ON
When "0" is written: OFF
Reading: Valid
By writing "1" to the PRPRT1 register, the clock
that is selected with the PST1 register is output to
the 16-bit programmable timer 1.
When "0" is written, the clock is not output.
At initial reset, the PRPRT1 register is set to "0"
(OFF).
PK11ON: EXCL01 clock control register
(00FF15HD1)
Controls the event counter clock of the 16-bit
programmable timer 1.
When "1" is written: ON
When "0" is written: OFF
Reading: Valid
By writing "1" to the PK11ON register, the EXCL01
(K11 input) clock is output to the 16-bit program-
mable timer 1.
When "0" is written, the clock is not output.
At initial reset, the PK11ON register is set to "0"
(OFF).