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TMPR3916 Datasheet(PDF) 197 Page - Toshiba Semiconductor

Part # TMPR3916
Description  32-Bit TX System RISC TX39 Family TMPR3916
PDF  225 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMPR3916 Datasheet(HTML) 197 Page - Toshiba Semiconductor

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Chapter 10 Asynchronous Serial Interface (UART)
Preliminary
10-22
START
TMPR3916 CCR REGISTER &
MUX CONFIGURATION
Reset UART: (SIFCR)
SWRST = 1
TFRST = 1
FRSTEW = 1
Line Control Register:
LSBF = 0
UEPS = 1
UPEN = 1
(Sets MSB first, 8 bit tx, etc)
Interrupt Control Register:
CTSAC = 01
sets CTS active status to rising
edge
Stop UART Reset (SIFCR)
TFRST = 0
FRSTEW = 0
Flow Control Register
TRS = 1
RSDR = 0
TSDR = 0
enables CTS hardware, storing of
received data.
BLOCK LENGTH >
0 ?
no
Check TXALS in
SISCISR (TX FIFO
empty)
0
TRANSMISSION
ENDS
STORE 2 ENTRIES
IN TX FIFO
SET BLOCK LENGTH
BLOCK LENGTH >
1 ?
1
STORE 1 ENTRY IN
TX FIFO
no
STORE BLOCK LENGTH IN TX
FIFO
BLOCK LENGTH =
BLOCK LENGTH - 2
BLOCK
LENGTH =
BLOCK LENGTH - 1
Figure 10.4.1 Example flow for a transmit operation. The operations written with the courier font are not
to be performed on the UART, but may involve TMPR3916 programming or only software
operations.
10.4.2
Receiver programming
In case of a reception operation, the flow of a simple driver could be like the one depicted in Figure
10.4.2. Here the parameters used to program the UART are:
•
8 bit data length
•
1 stop bit
•
even parity
•
MSB first
•
RTS hardware flow control
•
Software operates in polling mode



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