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21 REMOTE CONTROLLER (REMC)
272
EPSON
S1C17001 TECHNICAL MANUAL
21.4 Data Length Counter Clock Settings
The data length counter is an 8-bit counter for setting data lengths when transmitting data.
When a value corresponding to the data pulse width is written during data transmission, the data length counter be-
gins counting down from that value, generating an underflow interrupt factor and halting when the counter reaches 0.
The subsequent transmit data is set using this interrupt.
This counter is also used for data receiving, enabling measurement of the receive data length. Interrupts can be gen-
erated at the input signal rising or falling edges when receiving data. The data pulse length can be obtained from the
difference between data pulses by setting the data length counter to 0xff using the interrupt when the input changes
and by reading out the count value when a subsequent interrupt occurs due to input changes.
This data length counter count clock also uses a prescaler output clock and can select one of 15 different types. The
prescaler output clock is selected by the control bit LCCLK[3:0] (D[3:0]/REMC_PSC register) provided separately
to the carrier generation clock.
∗
LCCLK[3:0]
: Length Counter Clock Select Bits in the REMC Prescaler Clock Select (REMC_PSC) Register
(D[3:0]/0x5341)
Table 21.4.1: Data length counter clock selection
LCCLK[3:0]
Prescaler output clock
LCCLK[3:0]
Prescaler output clock
0xf
Reserved
0x7
PCLK-1/128
0xe
PCLK-1/16384
0x6
PCLK-1/64
0xd
PCLK-1/8192
0x5
PCLK-1/32
0xc
PCLK-1/4096
0x4
PCLK-1/16
0xb
PCLK-1/2048
0x3
PCLK-1/8
0xa
PCLK-1/1024
0x2
PCLK-1/4
0x9
PCLK-1/512
0x1
PCLK-1/2
0x8
PCLK-1/256
0x0
PCLK-1/1
(Default: 0x0)
The data length counter can count up to 256. The count clock should be selected to ensure that the data length fits
within this range.
Содержание S1C17001
Страница 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
Страница 31: ...3 MEMORY MAP AND BUS CONTROL 22 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 33: ...4 POWER SUPPLY VOLTAGE 24 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
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Страница 87: ...8 CLOCK GENERATOR CLG 78 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Страница 91: ...9 PRESCALER PSC 82 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
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Страница 185: ...14 8 BIT OSC1 TIMER T8OSC1 176 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
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