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Section 13 Serial Communication Interface (SCI)
Rev.2.00 Jun. 28, 2007 Page 508 of 666
REJ09B0311-0200
For the direct convention type, logic levels 1 and 0 correspond to states Z and A, respectively, and
data is transferred with LSB-first as the start character, as shown in figure 13.23. Therefore, data
in the start character in the figure is H'3B. When using the direct convention type, write 0 to both
the SDIR and SINV bits in SCMR. Write 0 to the O/
E
bit in SMR in order to use even parity,
which is prescribed by the smart card standard.
Ds
A
Z
Z
A
A
A
Z
A
A
A
(Z)
(Z) state
D7
D6
D5
D4
D3
D2
D1
D0
Dp
Figure 13.24 Inverse Convention (SDIR = SINV = O/
E
= 1)
For the inverse convention type, logic levels 1 and 0 correspond to states A and Z, respectively
and data is transferred with MSB-first as the start character, as shown in figure 13.24. Therefore,
data in the start character in the figure is H'3F. When using the inverse convention type, write 1 to
both the SDIR and SINV bits in SCMR. The parity bit is logic level 0 to produce even parity,
which is prescribed by the smart card standard, and corresponds to state Z. Since the SNIV bit of
this LSI only inverts data bits D7 to D0, write 1 to the O/
E
bit in SMR to invert the parity bit in
both transmission and reception.
13.7.3
Block Transfer Mode
Block transfer mode is different from normal smart card interface mode in the following respects.
•
Even if a parity error is detected during reception, no error signal is output. Since the PER bit
in SSR is set by error detection, clear the PER bit before receiving the parity bit of the next
frame.
•
During transmission, at least 1 etu is secured as a guard time after the end of the parity bit
before the start of the next frame.
•
Since the same data is not re-transmitted during transmission, the TEND flag is set 11.5 etu
after transmission start.
•
Although the ERS flag in block transfer mode displays the error signal status as in normal
smart card interface mode, the flag is always read as 0 because no error signal is transferred.
Содержание H8SX/1650
Страница 2: ...Rev 2 00 Jun 28 2007 Page ii of xxii...
Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
Страница 676: ...Appendix Rev 2 00 Jun 28 2007 Page 654 of 666 REJ09B0311 0200...
Страница 688: ...Rev 2 00 Jun 28 2007 Page 666 of 666 REJ09B0311 0200...
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Страница 692: ...H8SX 1650 Group Hardware Manual...