tmp19a61f10xbg TOSHIBA Semiconductor CORPORATION, tmp19a61f10xbg Datasheet - Page 321
tmp19a61f10xbg
Manufacturer Part Number
tmp19a61f10xbg
Description
32-bit Tx System Risc Tx19 Family
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP19A61F10XBG.pdf
(575 pages)
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TMP19A61F10XBG
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13.3.3
13.3.4
13.3.5
13.3.6
Serial Clock Generation Circuit
Receive Counter
Receive Control Unit
Receive Buffer
•
•
The receive counter is a 4-bit binary counter used in the asynchronous (UART) mode and is
up-counted by SIOCLK. Sixteen SIOCLK clock pulses are used in receiving a single data bit
while the data symbol is sampled at the seventh, eighth, and ninth pulses. From these three
samples, majority logic is applied to decide the received data.
•
•
The receive buffer is of a dual structure to prevent overrun errors. The first receive buffer (a
shift register) stores the received data bit-by-bit. When a complete set of bits have been
stored, they are moved to the second receive buffer (SC0BUF). At the same time, the
receive buffer full flag (SC0MOD2<RBFLL>) is set to “1” to indicate that valid data is stored
in the second receive buffer. However, if the receive FIFO is set enabled, the receive data is
moved to the receive FIFO and this flag is immediately cleared.
If
SC0MOD1<FDPX1:0>=01), the INTRX0 interrupt is generated at the same time. If the
receive FIFO has been enabled (SCNFCNF<CNFG>=1 and SC0MOD1<FDPX1:0>=01/11),
an interrupt will be generated according to the SCORFC < RIL2:0 > setting.
The CPU will read the data from either the second receive buffer (SC0BUF) or from the
This circuit generates basic transmit and receive clocks.
In the SCLK output mode with the SC0CR <IOC> serial control register set to “0,” the
output of the previously mentioned baud rate generator is divided by 2 to generate the
basic clock.
In the SCLK input mode with SC0CR <IOC> set to “1,” rising and falling edges are
detected according to the SC0CR <SCLKS> setting to generate the basic clock.
According to the settings of the serial control mode register SC0MOD0<SC1:0>, either
the clock from the baud rate register, the system clock (f
of the TMRB4 timer, or the external clock (SCLKO pin) is selected to generate the basic
clock, SIOCLK.
In the SCLK output mode with SC0CR <IOC> set to “0,” the RXD0 pin is sampled on the
rising edge of the shift clock output to the SCLK0 pin.
In the SCLK input mode with SC0CR <IOC> set to “1,” the serial receive data RXD0 pin
is sampled on the rising or falling edge of SCLK input depending on the SC0CR
<SCLKS> setting.
The receive control unit has a start bit detection circuit, which is used to initiate receive
operation when a normal start bit is detected.
the
I/O interface mode
Asynchronous (UART) mode
I/O interface mode
Asynchronous (UART) mode
receive
FIFO
TMP19A61 (rev1.0)-13-320
has
been
disabled
(SCOFCNF
SYS
/2), the internal output signal
<CNFG>
TMP19A61
=
0
and
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