Figure 13-9: Continuous Transmission Starting Procedure - NEC V850E/CA2 JUPITER Preliminary User's Manual

(a) Starting procedure
Figure 13-9 shows the procedure to start continuous transmission.

Figure 13-9: Continuous Transmission Starting Procedure

TXD5n
(output)
INTST5n
(output)
TXB5n
FFH
register
Transmission shift
register
ASIF5n register
(TXBF, TXSF
00
bits)
<1>
Transmission Starting Procedure
<1> Set transmission mode
<2> Write data (1) to TXBn register
<4> Read ASIFn register (confirm that TXBF bit = 0)
Write data (2)
<6> Read ASIFn register (confirm that TXBF bit = 0)
Write data (3)
<9> Read ASIFn register (confirm that TXBF bit = 0)
Write data (4)
Note: For a certain time it may happen that the bit combinations of TXBF and TXSF bits 00B or 11B
can be read.
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Chapter 13 Serial Interface Function
Start Data (1)
Data (1)
FFH Data (1)
10 01
<2> <3>
Preliminary User's Manual U15839EE1V0UM00
Parity Stop
Data (2)
11 01
<4> <5> <6> <7>
Internal Operation
<3> Generate start bit
Start data (1) transmission
<<Transmission in progress>>
<5> Generate transmission
completion interrupt (INTSTn)
<7> Generate start bit
Start data (2) transmission
<<Transmission in progress>>
<8> Generate transmission
completion interrupt (INTSTn)
Start Data (2) Parity
Data (3)
Data (2)
11
ASIFn Register
TXBF bit TXSF bit
0
1
0
Note
1
0
1
0
1
Stop
Data (3)
01 11
<9>
8>
0
0
1
1
1
1
1
1